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Oppo A40 (4GB + 128GB) Review | 197 Data compared

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  • Avg. price: ~£95
  • RAM capacity: 4 GB
  • Internal storage: 128 GB
  • Screen size: 6.67 inches
  • Main camera megapixels: 50 MP

Oppo A40 (4GB + 128GB) review. Compare 197 technical specifications and user reviews to see how it ranks among smartphones and if it's worth buying.

7.2

Overall score

What it is: An overall evaluation of the smartphone's quality, based on technical analyses and user reviews.

When it matters: When you need a quick reference to identify the best smartphones on the market.

Score components:

90.0%

7.1

Technical Score

10.0%

8.1

User score

Very good
7.1

Technical Score

What it is: An assessment of the smartphone's technical performance, covering eight key areas: performance & hardware, software, camera, connectivity, display, battery, audio, and design.

When it matters: When you want to compare smartphones based on technical performance and available features.

Score components:

25.0%

7.2

Performance & Hardware

18.0%

6.7

Camera

15.0%

5.7

Display

15.0%

7.9

Battery

10.0%

8.2

Software

10.0%

7.9

Connectivity

4.0%

5.4

Audio

3.0%

7.6

Design

Very good
8.1

User score

What it is: A rating that combines user reviews and the total number of reviews received by the smartphone

When it matters: When you want to know how a smartphone handles daily tasks and how reliable it remains over time according to user feedback.

Score components:

70.0%

8.5

User reviews

30.0%

7.0

Popularity

User score:
amazon
4.4
(150)
amazon
4.0
(109)
Amazon
4.6
(30)

(Reviews last updated: Mar 2026)

Excellent
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    Best prices

    Best rankings

    ?

    Available: ranking among products currently available (including other versions of this product).
    All: ranking among all products in the database.

    Available versions:
    4GB + 128GB8GB + 256GB£?

    Technical Specifications of smartphone Oppo A40 (4GB + 128GB)

    Technical Score

    What it is: An assessment of the smartphone's technical performance, covering eight key areas: performance & hardware, software, camera, connectivity, display, battery, audio, and design.

    When it matters: When you want to compare smartphones based on technical performance and available features.

    Score components:

    25.0%

    7.2

    Performance & Hardware

    18.0%

    6.7

    Camera

    15.0%

    5.7

    Display

    15.0%

    7.9

    Battery

    10.0%

    8.2

    Software

    10.0%

    7.9

    Connectivity

    4.0%

    5.4

    Audio

    3.0%

    7.6

    Design

    7.1
    Oppo A40 (4GB + 128GB) has a technical score of 7.1 points, which is lower than 74.1% of smartphones.
    User score

    What it is: A rating that combines user reviews and the total number of reviews received by the smartphone

    When it matters: When you want to know how a smartphone handles daily tasks and how reliable it remains over time according to user feedback.

    Score components:

    70.0%

    8.5

    User reviews

    30.0%

    7.0

    Popularity

    User score:
    amazon
    4.4
    (150)
    amazon
    4.0
    (109)
    Amazon
    4.6
    (30)

    (Reviews last updated: Mar 2026)

    8.1
    Oppo A40 (4GB + 128GB) has a user score of 8.08 points, which is higher than 67.3% of smartphones.
    Popularity
    What it is: An indicator based on the number of reviews received by the smartphone.
    When it matters: When you prefer to purchase a product chosen and reviewed by many other consumers.
    7.0
    Oppo A40 (4GB + 128GB) has a popularity of 7 points, which is higher than 65.1% of smartphones.
    Ratio quality/price

    What it is: An indicator that combines the smartphone's overall rating with its cost.

    When it matters: When you are looking for a smartphone with a good balance between quality and price.

    Score components:

    60.0%

    7.2

    Overall score

    40.0%

    10

    Price

    8.3
    Oppo A40 (4GB + 128GB) has a quality-to-price ratio of 8.3 points, which is higher than 62.1% of smartphones.
    Brand name
    What it is: The manufacturer or brand under which the smartphone is marketed and sold.
    When it matters: When you prefer a specific ecosystem, support network, or design philosophy.

    Importance: MEDIUM

    Oppo
    Processor model
    What it is: The central System-on-Chip (SoC) that houses the CPU, GPU, modem, and other core processing components.
    When it matters: When you want to know the specific engine powering your device's speed and features.

    Importance: HIGH

    Qualcomm Snapdragon 6 Gen 1
    RAM capacity
    What it is: The amount of volatile memory available for running apps and multitasking.
    When it matters: When you use multiple apps at once or want smoother multitasking without reloads.

    Importance: HIGH

    Good value: >12 GB

    4 GB
    Oppo A40 (4GB + 128GB) has a RAM capacity of 4 GB which is smaller than the RAM capacity of 82.6% of smartphones and equal to that of 14% of smartphones.
    Internal storage
    What it is: The total built-in space available for apps, media, and files.
    When it matters: When you keep large libraries of photos, videos, and apps directly on your device.

    Importance: HIGH

    Good value: >256 GB

    128 GB
    Oppo A40 (4GB + 128GB) has an internal storage capacity of 128 GB which is smaller than the storage of 61.1% of smartphones and equal to that of 28.4% of smartphones.
    CPU boost clock speed
    What it is: The maximum speed the processor can achieve temporarily under heavy load.
    When it matters: When you run demanding apps or games that require short bursts of peak performance.

    Importance: MEDIUM

    Good value: >3.2 GHz

    2.2 GHz
    The CPU boost clock speed of Oppo A40 (4GB + 128GB) is 2.2 GHz which is lower than the boost speed of 68.4% of smartphones and equal to that of 14.4% of smartphones.
    Show more
    Operating system
    What it is: The primary system software that manages the smartphone's hardware and software resources.
    When it matters: When you have a preference for the user interface and app ecosystem.

    Importance: HIGH

    Android
    Android 14
    Oppo A40 (4GB + 128GB) uses the Android operating system, which outperforms that of 1% of smartphones.
    Android 14
    Android version
    What it is: The specific generation number of the Android operating system installed on the device.
    When it matters: When you want to ensure app compatibility and access to the latest software features.

    Importance: LOW

    Android 14
    Oppo A40 (4GB + 128GB) runs Android version Android 14 which is newer than that found in 49.1% of smartphones and equal to that in 21.2% of smartphones.
    Direct OS updates
    What it is: Indicates whether the device receives operating system updates directly from the manufacturer or Google, ensuring timely security and feature updates.
    When it matters: When you want the fastest access to new features and security patches.

    Importance: HIGH

    no
    Oppo A40 (4GB + 128GB) does not receive direct OS updates. 20.5% of smartphones receive direct updates.
    Open-source OS
    What it is: Shows whether the device’s operating system is based on open-source code, allowing community contributions and greater transparency.
    When it matters: When you value transparency and potential community-driven modifications.

    Importance: LOW

    yes
    Oppo A40 (4GB + 128GB) uses an open-source OS. 94.6% of smartphones use an open-source OS.
    Dark mode
    What it is: A display option that uses dark backgrounds to reduce eye strain and save battery on OLED screens.
    When it matters: When you want to reduce eye strain at night or save battery on OLED screens.

    Importance: LOW

    yes
    Oppo A40 (4GB + 128GB) offers dark mode. 95.8% of smartphones support this feature.
    Show more
    Multi-lens main camera
    What it is: Indicates that the rear camera system includes multiple lenses (e.g., wide, ultra-wide, telephoto) for versatile shooting options.
    When it matters: When you want versatility to shoot wide landscapes, standard shots, and zoomed details.

    Importance: MEDIUM

    yes
    Oppo A40 (4GB + 128GB) includes a multi-lens main camera system. 93.7% of smartphones include multi-lens setups.
    Main camera megapixels
    What it is: The resolution of the primary rear camera sensor, measured in millions of pixels (MP). Higher megapixels can capture more detail.
    When it matters: When you want to capture high-resolution images that can be cropped or printed large.

    Importance: HIGH

    Good value: >50 MP

    50 MP
    Main camera aperture
    What it is: The size of the lens opening (f-stop) that controls light entry. A lower f-number indicates a wider aperture, allowing better low-light shots.
    When it matters: When you want better low-light performance or a natural background blur effect.

    Importance: HIGH

    f/1.8
    Main camera sensor area
    What it is: The total physical surface area of the camera sensor (calculated by multiplying the number of megapixels by the square of the individual pixel size). A larger area captures more light, resulting in better night photos and less digital noise.
    When it matters: When you want to capture clear, detailed photos in low-light conditions with minimal grain and achieve a natural, professional-looking background blur for portraits.

    Importance: HIGH

    Good value: >60

    20.5 mm²
    Oppo A40 (4GB + 128GB) has a main camera sensor area of 20.5 mm² which is smaller than the main camera sensor area of 76.1% of smartphones and equal to that of 12.9% of smartphones.
    Main camera pixel size
    What it is: The physical size of individual pixels on the camera sensor, measured in micrometers. Larger pixels typically capture more light for better low-light performance.
    When it matters: When you shoot in low light and want reduced noise in your photos.

    Importance: MEDIUM

    Good value: ≥1.2 µm

    0.64 µm
    1.28 binned
    Oppo A40 (4GB + 128GB) has a main camera pixel size of 0.64 µm which is smaller than in 75.1% of smartphones and equal to the size in 18.6% of smartphones.
    1.28 binned
    Show more
    Number of SIM slots
    What it is: The number of physical SIM cards or eSIM profiles the device can support simultaneously.
    When it matters: When you need to manage two different phone numbers or travel internationally with a local SIM.

    Importance: MEDIUM

    Good value: ≥2

    2
    Oppo A40 (4GB + 128GB) has 2 SIM slots, which is more than in 3.9% of smartphones and equal to the number in 96% of smartphones.
    Cellular module
    What it is: The hardware component capable of connecting to mobile cellular networks for voice and data.
    When it matters: When you need to stay connected to calls and internet away from Wi-Fi.

    Importance: LOW

    yes
    Oppo A40 (4GB + 128GB) includes a cellular module. 100% of smartphones include cellular modules.
    5G connectivity
    What it is: Support for the fifth generation of mobile network technology, offering significantly faster data speeds and lower latency.
    When it matters: When you need the fastest possible mobile data speeds for streaming and downloading on the go.

    Importance: MEDIUM

    no
    Oppo A40 (4GB + 128GB) does not support 5G connectivity. 66.9% of smartphones support 5G.
    LTE support
    What it is: Support for Long-Term Evolution (4G) networks, providing high-speed mobile data.
    When it matters: When you need reliable mobile internet coverage in areas where 5G isn't available.

    Importance: HIGH

    yes
    Oppo A40 (4GB + 128GB) supports LTE. 99.7% of smartphones include LTE connectivity.
    Wi-Fi connectivity
    What it is: The ability to connect to wireless local area networks for internet access and local networking.
    When it matters: When you want to save mobile data and connect to home or public networks.

    Importance: HIGH

    yes
    Oppo A40 (4GB + 128GB) supports Wi-Fi connectivity. 100% of smartphones offer Wi-Fi support.
    Show more
    Screen size
    What it is: The physical diagonal measurement of the display area, usually expressed in inches.
    When it matters: When you choose between a compact phone for one-handed use or a large screen for media.

    Importance: MEDIUM

    Good value: ≥6.6 inches

    6.67 inches
    Oppo A40 (4GB + 128GB) has a screen size of 6.67 inches which is larger than the screens of 38.3% of smartphones and equal to those of 13.3% of smartphones.
    Screen resolution
    What it is: The total number of pixels displayed on the screen, expressed as width x height, determining sharpness.
    When it matters: When you want crisp text and sharp details in photos and videos.

    Importance: HIGH

    720 x 1604 px
    Pixel density
    What it is: The concentration of pixels on the display, measured in pixels per inch (PPI), affecting image clarity.
    When it matters: When you want the image to look perfectly smooth with no visible pixels.

    Importance: HIGH

    Good value: >400 ppi

    264 ppi
    Oppo A40 (4GB + 128GB) has a pixel density of 264 ppi which is lower than that of 88.1% of smartphones and equal to that of 2.6% of smartphones.
    Display type
    What it is: The specific technology used for the screen panel (e.g., OLED, IPS LCD), influencing contrast, color, and efficiency.
    When it matters: When you care about vibrant colors, deep blacks, and battery efficiency.

    Importance: HIGH

    IPS LCD
    Oppo A40 (4GB + 128GB) uses a IPS LCD display type. 0% of smartphones use this display technology.
    Refresh rate
    What it is: The number of times per second the display updates the image, measured in Hertz (Hz); higher rates offer smoother motion.
    When it matters: When you want scrolling to feel fluid and games to look smoother.

    Importance: HIGH

    Good value: ≥120 Hz

    90 Hz
    Oppo A40 (4GB + 128GB) supports a refresh rate of 90 Hz which is lower than in 65.4% of smartphones and equal to that in 18.9% of smartphones.
    Show more
    Battery capacity
    What it is: The amount of electric charge the battery can hold, measured in milliampere-hours (mAh).
    When it matters: When you want a general idea of how large the battery is physically.

    Importance: HIGH

    Good value: >5000 mAh

    5100 mAh
    Oppo A40 (4GB + 128GB) has a battery capacity of 5100 mAh which is larger than the batteries in 59.5% of smartphones and equal to those in 2% of smartphones.
    Charging speed
    What it is: The maximum power input supported for wired charging, measured in Watts (W).
    When it matters: When you are in a rush and need to top up your battery quickly.

    Importance: HIGH

    Good value: >60 W

    45 W
    Oppo A40 (4GB + 128GB) supports charging speeds of 45 W which is faster than in 57.1% of smartphones and equal to speeds in 6.6% of smartphones.
    Fast charging
    What it is: In the context of modern electronics, "Fast Charging" refers to any technology that delivers power significantly higher than the traditional USB baseline. While the industry standard for a basic charger is 5W (5V at 1A), a charger is generally classified as a fast charger if it provides at least 18W of power.
    When it matters: When you want to minimize the time your phone spends tethered to a wall outlet.

    Importance: MEDIUM

    yes
    Oppo A40 (4GB + 128GB) supports fast charging. 93.1% of smartphones support fast charging.
    GSMArena full wired charge time
    What it is: The time taken to charge the battery from 0% to 100% using the bundled or recommended charger, as measured by GSMArena.
    When it matters: When you want to know exactly how long it takes to charge from 0 to 100% in real-world tests.

    Importance: MEDIUM

    Good value: <45 min

    ?
    Wireless charging
    What it is: The ability to charge the battery without cables by placing the device on a compatible charging pad.
    When it matters: When you prefer the convenience of dropping your phone on a pad without fumbling with cables.

    Importance: MEDIUM

    no
    Oppo A40 (4GB + 128GB) does not support wireless charging. 25.3% of smartphones support wireless charging.
    Show more
    Stereo speakers
    What it is: A setup involving two or more speakers to create a left-right audio separation for immersive sound.
    When it matters: When you watch videos or play games without headphones and want immersive sound.

    Importance: MEDIUM

    no
    Oppo A40 (4GB + 128GB) does not include stereo speakers. 64.5% of smartphones provide stereo audio.
    3.5 mm headphone jack
    What it is: A standard analog audio port for connecting wired headphones or auxiliary cables.
    When it matters: When you prefer using traditional wired headphones without dongles or adapters.

    Importance: LOW

    yes
    Oppo A40 (4GB + 128GB) includes a 3.5 mm headphone jack. 45.4% of smartphones still offer this port.
    Number of microphones
    What it is: The total count of microphones on the device, used for audio recording, noise cancellation, and voice isolation.
    When it matters: When you want clear audio recording and better noise cancellation during calls.

    Importance: MEDIUM

    Good value: ≥3

    1
    Oppo A40 (4GB + 128GB) has 1 microphones, which is fewer than in 89.6% of smartphones and equal to the number in 10.4% of smartphones.
    FM radio
    What it is: A built-in receiver allowing users to listen to local FM radio stations using wired headphones as an antenna.
    When it matters: When you want to listen to local radio stations without using mobile data.

    Importance: LOW

    no
    Oppo A40 (4GB + 128GB) does not include an FM radio. 33.7% of smartphones offer FM radio functionality.
    aptX Lossless
    What it is: A Bluetooth technology designed to deliver CD-quality audio without data loss during transmission.
    When it matters: When you demand CD-quality audio over Bluetooth with no loss of detail.

    Importance: LOW

    no
    Oppo A40 (4GB + 128GB) does not support aptX Lossless. 12.9% of smartphones provide aptX Lossless.
    Show more
    Height
    What it is: The vertical dimension of the device.
    When it matters: When you are concerned about whether the phone will fit in your pocket or purse.

    Importance: LOW

    Good value: <162 mm

    165.77 mm
    Oppo A40 (4GB + 128GB) has a height of 165.77 mm which is taller than 73.7% of smartphones and equal to that of 0.2% of smartphones.
    Width
    What it is: The horizontal dimension of the device when held in portrait orientation.
    When it matters: When you care about how easy the phone is to grip and use with one hand.

    Importance: LOW

    Good value: <75 mm

    76 mm
    Oppo A40 (4GB + 128GB) has a width of 76 mm which is narrower than 47.3% of smartphones and equal to that of 3.2% of smartphones.
    Thickness
    What it is: The depth of the device profile, excluding the camera bump unless specified.
    When it matters: When you prefer a sleek, slim profile that slides easily into tight pockets.

    Importance: LOW

    Good value: <8 mm

    7.68 mm
    Oppo A40 (4GB + 128GB) has a thickness of 7.68 mm which is thinner than 85.2% of smartphones and equal to that of 0.4% of smartphones.
    Weight
    What it is: The total mass of the smartphone, affecting how heavy it feels in the hand.
    When it matters: When you want a phone that feels light in your pocket or substantial in your hand.

    Importance: MEDIUM

    Good value: <190 g

    186 g
    Oppo A40 (4GB + 128GB) weighs 186 g which is lighter than 75.6% of smartphones and equal to the weight of 2.5% of smartphones.
    Device volume
    What it is: The calculated total volume of the device's physical body.
    When it matters: When you want to understand the overall physical bulk of the device.

    Importance: LOW

    Good value: <98cm³

    87780 cm³
    Oppo A40 (4GB + 128GB) has a device volume of 87780 cm³ which is smaller than 72.7% of smartphones and equal to that of 1.5% of smartphones.
    Show more

    Oppo A40 (4GB + 128GB) vs the average smartphone

    • Newer DDR memory version
      Oppo A40 (4GB + 128GB) supports a newer DDR version than the average smartphone (5.0 vs 4.0). The average DDR version is 4.
      What it is: The generation of DDR (Double Data Rate) RAM used in the device (e.g., LPDDR4X, LPDDR5). Newer versions offer better speed and power efficiency.
      When it matters: When you want the latest balance of high speed and improved power efficiency.

      Importance: MEDIUM

      Good value: 5

      Oppo A40 (4GB + 128GB) supports a newer DDR version than the average smartphone (5.0 vs 4.0). The average DDR version is 4.5.0 vs 4.0
    • 51.5% higher screen brightness
      Oppo A40 (4GB + 128GB) has a higher screen brightness than the average smartphone (1000 nits vs 660 nits). The average smartphone brightness is 660 nits.
      What it is: The highest sustained brightness level the screen can achieve to remain visible under direct sunlight.
      When it matters: When you need to read your screen clearly under direct sunlight.

      Importance: MEDIUM

      Good value: >800 nits

      Oppo A40 (4GB + 128GB) has a higher screen brightness than the average smartphone (1000 nits vs 660 nits). The average smartphone brightness is 660 nits.1000 nits vs 660 nits
    • Uses a BSI sensor
      Oppo A40 (4GB + 128GB) uses a BSI sensor, the average smartphone does not. 40.1% of smartphones include BSI sensors.
      What it is: Indicates the use of a Back-Side Illuminated sensor, which arranges the wiring behind the light-receiving surface to improve low-light sensitivity.
      When it matters: When you take photos in dim environments and need better light sensitivity.

      Importance: LOW

      Oppo A40 (4GB + 128GB) uses a BSI sensor, the average smartphone does not. 40.1% of smartphones include BSI sensors.
    • 2% larger battery capacity
      Oppo A40 (4GB + 128GB) has a larger battery capacity than the average smartphone (5100 mAh vs 5000 mAh). The average smartphone battery is 5000 mAh.
      What it is: The amount of electric charge the battery can hold, measured in milliampere-hours (mAh).
      When it matters: When you want a general idea of how large the battery is physically.

      Importance: HIGH

      Good value: >5000 mAh

      Oppo A40 (4GB + 128GB) has a larger battery capacity than the average smartphone (5100 mAh vs 5000 mAh). The average smartphone battery is 5000 mAh.5100 mAh vs 5000 mAh
    • 0.62 mm thinner
      Oppo A40 (4GB + 128GB) is thinner than the average smartphone (7.7 mm vs 8.3 mm). The average smartphone thickness is 8.3 mm.
      What it is: The depth of the device profile, excluding the camera bump unless specified.
      When it matters: When you prefer a sleek, slim profile that slides easily into tight pockets.

      Importance: LOW

      Good value: <8 mm

      Oppo A40 (4GB + 128GB) is thinner than the average smartphone (7.7 mm vs 8.3 mm). The average smartphone thickness is 8.3 mm.7.68 mm vs 8.3 mm
    • Has a 3.5 mm headphone jack
      Oppo A40 (4GB + 128GB) features a 3.5 mm headphone jack, the average smartphone does not. 45.4% of smartphones include a standard headphone jack.
      What it is: A standard analog audio port for connecting wired headphones or auxiliary cables.
      When it matters: When you prefer using traditional wired headphones without dongles or adapters.

      Importance: LOW

      Oppo A40 (4GB + 128GB) features a 3.5 mm headphone jack, the average smartphone does not. 45.4% of smartphones include a standard headphone jack.
    • 5.2% lighter
      Oppo A40 (4GB + 128GB) is lighter than the average smartphone (186 g vs 196.2 g). The average smartphone weighs 196.2 g.
      What it is: The total mass of the smartphone, affecting how heavy it feels in the hand.
      When it matters: When you want a phone that feels light in your pocket or substantial in your hand.

      Importance: MEDIUM

      Good value: <190 g

      Oppo A40 (4GB + 128GB) is lighter than the average smartphone (186 g vs 196.2 g). The average smartphone weighs 196.2 g.186.0 g vs 196.2 g
    • 36.4% faster charging speed
      Oppo A40 (4GB + 128GB) supports a faster charging speed than the average smartphone (45 W vs 33 W). The average charging speed is 33 W.
      What it is: The maximum power input supported for wired charging, measured in Watts (W).
      When it matters: When you are in a rush and need to top up your battery quickly.

      Importance: HIGH

      Good value: >60 W

      Oppo A40 (4GB + 128GB) supports a faster charging speed than the average smartphone (45 W vs 33 W). The average charging speed is 33 W.45 W vs 33 W
    • Newer DDR memory version
      Oppo A40 (4GB + 128GB) supports a newer DDR version than the average smartphone (5.0 vs 4.0). The average DDR version is 4.
    • 16.7% lower TDP
      Oppo A40 (4GB + 128GB) has a lower TDP than the average smartphone (7 W vs 6 W). The average TDP for smartphones is 6 W.
    • Uses a BSI sensor
      Oppo A40 (4GB + 128GB) uses a BSI sensor, the average smartphone does not. 40.1% of smartphones include BSI sensors.
    • 51.5% higher screen brightness
      Oppo A40 (4GB + 128GB) has a higher screen brightness than the average smartphone (1000 nits vs 660 nits). The average smartphone brightness is 660 nits.
    • 2% larger battery capacity
      Oppo A40 (4GB + 128GB) has a larger battery capacity than the average smartphone (5100 mAh vs 5000 mAh). The average smartphone battery is 5000 mAh.
    • 36.4% faster charging speed
      Oppo A40 (4GB + 128GB) supports a faster charging speed than the average smartphone (45 W vs 33 W). The average charging speed is 33 W.
    • Has a 3.5 mm headphone jack
      Oppo A40 (4GB + 128GB) features a 3.5 mm headphone jack, the average smartphone does not. 45.4% of smartphones include a standard headphone jack.
    • 0.62 mm thinner
      Oppo A40 (4GB + 128GB) is thinner than the average smartphone (7.7 mm vs 8.3 mm). The average smartphone thickness is 8.3 mm.
    • 5.2% lighter
      Oppo A40 (4GB + 128GB) is lighter than the average smartphone (186 g vs 196.2 g). The average smartphone weighs 196.2 g.

    Total
    Overall
    Performance & Hardware
    Camera
    Display
    Battery
    Audio
    Design
    • 50% less storage
      Oppo A40 (4GB + 128GB) offers less internal storage than the average smartphone (128 GB vs 256 GB). The average smartphone includes 256 GB of internal storage.
    • 4 GB less RAM
      Oppo A40 (4GB + 128GB) has less RAM than the average smartphone (4 GB vs 8 GB). The average smartphone has 8 GB of RAM.
    • 15.8% slower GPU clock
      Oppo A40 (4GB + 128GB) has a lower GPU frequency than the average smartphone (800 MHz vs 950 MHz). The average smartphone has a GPU frequency of 950 MHz.
    • 50% less L3 cache
      Oppo A40 (4GB + 128GB) has a smaller L3 cache than the average smartphone (2048 KB vs 4096 KB). The average smartphone has an L3 cache of 4096 KB.
    • 14.3% lower maximum RAM capacity
      Oppo A40 (4GB + 128GB) supports less maximum RAM than the average smartphone (12 GB vs 14 GB). The average smartphone supports 14 GB of RAM.
    • 8.3% lower CPU boost clock speed
      Oppo A40 (4GB + 128GB) has a lower CPU boost clock speed than the average smartphone (2.2 GHz vs 2.4 GHz). The average smartphone has a boost clock speed of 2.4 GHz.
    • Lacks focus mode
      Oppo A40 (4GB + 128GB) does not have a focus mode, the average smartphone does. 60.4% of smartphones include a dedicated focus mode.
    • No Wi-Fi password sharing
      Oppo A40 (4GB + 128GB) does not support Wi-Fi password sharing, the average smartphone does. 57.9% of smartphones allow easy Wi-Fi sharing.
    • 35.9% smaller main camera sensor area
      Oppo A40 (4GB + 128GB) has a smaller main camera sensor area than the average smartphone (20.5 mm² vs 32 mm²). The average smartphone sensor area is 32 mm².
    • 0.16 µm smaller main camera pixel size
      Oppo A40 (4GB + 128GB) has a smaller main camera pixel size than the average smartphone (0.6 µm vs 0.8 µm). The average smartphone has a pixel size of 0.8 µm.
      1.28 binned
    • Worse main camera video quality
      Oppo A40 (4GB + 128GB) records worse main camera video than the average smartphone. 11.80x of smartphones support 4K video recording.
    • No 5G connectivity
      Oppo A40 (4GB + 128GB) does not support 5G connectivity, the average smartphone does. 66.9% of smartphones are 5G compatible.
    • Older Bluetooth version
      Oppo A40 (4GB + 128GB) uses an older Bluetooth version than the average smartphone (5.0 vs 5.2). The average smartphone uses Bluetooth 5.2.
    • Inferior display type
      Oppo A40 (4GB + 128GB) has an inferior display type compared to the average smartphone (IPS LCD vs OLED/AMOLED ). 0.00% of smartphones use the superior display type.
    • 25% lower refresh rate
      Oppo A40 (4GB + 128GB) has a lower refresh rate than the average smartphone (90 Hz vs 120 Hz). The average smartphone has a refresh rate of 120 Hz.
    • 33.2% lower pixel density
      Oppo A40 (4GB + 128GB) has a lower pixel density than the average smartphone (264 ppi vs 395 ppi). The average smartphone has a pixel density of 395 ppi.
    • 25% lower touch sampling rate
      Oppo A40 (4GB + 128GB) has a lower touch sampling rate than the average smartphone (180 Hz vs 240 Hz). The average smartphone has a sampling rate of 240 Hz.
    • No stereo speakers
      Oppo A40 (4GB + 128GB) does not have stereo speakers, the average smartphone does. 64.5% of smartphones feature stereo speakers.
    • No aptX HD
      Oppo A40 (4GB + 128GB) does not support aptX HD, the average smartphone does. 50.4% of smartphones support aptX HD.
    • 1 fewer microphone/s
      Oppo A40 (4GB + 128GB) has fewer microphones than the average smartphone (1 vs 2). The average smartphone has 2 microphones.
    • Lower IP rating
      Oppo A40 (4GB + 128GB) has a lower IP rating than the average smartphone (IP54 vs IP67 ). 0.00% of smartphones have a higher IP rating.
    • 2.17 mm taller
      Oppo A40 (4GB + 128GB) is taller than the average smartphone (165.8 mm vs 163.6 mm). The average smartphone has a height of 163.6 mm.
    • Inferior display type
      Oppo A40 (4GB + 128GB) has an inferior display type compared to the average smartphone (IPS LCD vs OLED/AMOLED ). 0.00% of smartphones use the superior display type.
      What it is: The specific technology used for the screen panel (e.g., OLED, IPS LCD), influencing contrast, color, and efficiency.
      When it matters: When you care about vibrant colors, deep blacks, and battery efficiency.

      Importance: HIGH

      Oppo A40 (4GB + 128GB) has an inferior display type compared to the average smartphone (IPS LCD vs OLED/AMOLED ). 0.00% of smartphones use the superior display type.IPS LCD vs OLED/AMOLED
    • No 5G connectivity
      Oppo A40 (4GB + 128GB) does not support 5G connectivity, the average smartphone does. 66.9% of smartphones are 5G compatible.
      What it is: Support for the fifth generation of mobile network technology, offering significantly faster data speeds and lower latency.
      When it matters: When you need the fastest possible mobile data speeds for streaming and downloading on the go.

      Importance: MEDIUM

      Oppo A40 (4GB + 128GB) does not support 5G connectivity, the average smartphone does. 66.9% of smartphones are 5G compatible.
    • No stereo speakers
      Oppo A40 (4GB + 128GB) does not have stereo speakers, the average smartphone does. 64.5% of smartphones feature stereo speakers.
      What it is: A setup involving two or more speakers to create a left-right audio separation for immersive sound.
      When it matters: When you watch videos or play games without headphones and want immersive sound.

      Importance: MEDIUM

      Oppo A40 (4GB + 128GB) does not have stereo speakers, the average smartphone does. 64.5% of smartphones feature stereo speakers.
    • 50% less storage
      Oppo A40 (4GB + 128GB) offers less internal storage than the average smartphone (128 GB vs 256 GB). The average smartphone includes 256 GB of internal storage.
      What it is: The total built-in space available for apps, media, and files.
      When it matters: When you keep large libraries of photos, videos, and apps directly on your device.

      Importance: HIGH

      Good value: >256 GB

      Oppo A40 (4GB + 128GB) offers less internal storage than the average smartphone (128 GB vs 256 GB). The average smartphone includes 256 GB of internal storage.128 GB vs 256 GB
    • 33.2% lower pixel density
      Oppo A40 (4GB + 128GB) has a lower pixel density than the average smartphone (264 ppi vs 395 ppi). The average smartphone has a pixel density of 395 ppi.
      What it is: The concentration of pixels on the display, measured in pixels per inch (PPI), affecting image clarity.
      When it matters: When you want the image to look perfectly smooth with no visible pixels.

      Importance: HIGH

      Good value: >400 ppi

      Oppo A40 (4GB + 128GB) has a lower pixel density than the average smartphone (264 ppi vs 395 ppi). The average smartphone has a pixel density of 395 ppi.264 ppi vs 395 ppi
    • 25% lower refresh rate
      Oppo A40 (4GB + 128GB) has a lower refresh rate than the average smartphone (90 Hz vs 120 Hz). The average smartphone has a refresh rate of 120 Hz.
      What it is: The number of times per second the display updates the image, measured in Hertz (Hz); higher rates offer smoother motion.
      When it matters: When you want scrolling to feel fluid and games to look smoother.

      Importance: HIGH

      Good value: ≥120 Hz

      Oppo A40 (4GB + 128GB) has a lower refresh rate than the average smartphone (90 Hz vs 120 Hz). The average smartphone has a refresh rate of 120 Hz.90 Hz vs 120 Hz
    • Lower IP rating
      Oppo A40 (4GB + 128GB) has a lower IP rating than the average smartphone (IP54 vs IP67 ). 0.00% of smartphones have a higher IP rating.
      What it is: A standardized code (Ingress Protection) indicating the device's resistance to dust and water intrusion.
      When it matters: When you want to know if your phone can survive a splash, a dunk, or a dusty environment.

      Importance: MEDIUM

      Oppo A40 (4GB + 128GB) has a lower IP rating than the average smartphone (IP54 vs IP67 ). 0.00% of smartphones have a higher IP rating.IP54 vs IP67
    • 4 GB less RAM
      Oppo A40 (4GB + 128GB) has less RAM than the average smartphone (4 GB vs 8 GB). The average smartphone has 8 GB of RAM.
      What it is: The amount of volatile memory available for running apps and multitasking.
      When it matters: When you use multiple apps at once or want smoother multitasking without reloads.

      Importance: HIGH

      Good value: >12 GB

      Oppo A40 (4GB + 128GB) has less RAM than the average smartphone (4 GB vs 8 GB). The average smartphone has 8 GB of RAM.4 GB vs 8 GB
    Total
    Performance & Hardware
    Software
    Camera
    Connectivity
    Display
    Audio
    Design

    Graphic comparison of Oppo A40 (4GB + 128GB) and other smartphones

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    Third-party reviews

    amazon
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    4.5
    47 Reviews

    (Reviews last updated: Mar 2026)

    4.4
    150 Reviews
    4.0
    109 Reviews
    4.6
    30 Reviews

    (Reviews last updated: Mar 2026)

    4.4
    420 Reviews
    4.4
    100 Reviews
    4.5
    47 Reviews

    (Reviews last updated: Mar 2026)

    What customers like about Oppo A40 (4GB + 128GB)?

    • Affordability: Highly praised as a value-for-money budget option, especially for casual users.
    • Battery Performance: Features a long-lasting 5,100mAh battery that can often extend into a second day of light use.
    • Durability: Boasts military-grade (MIL-STD-810H) shock resistance and an IP54 splash-proof rating.
    • Display Features: The 6.67-inch screen supports a 90Hz refresh rate for smoother scrolling and reaches up to 1,000 nits of brightness.
    • Design and Ergonomics: Lightweight (186g) and slim build, making it comfortable for extended periods of use.
    • Software: Comes with user-friendly ColorOS 14 (based on Android 14) with a promise of two major OS updates.

    What customers dislike about Oppo A40 (4GB + 128GB)?

    • Processing Speed: The Snapdragon 6s 4G Gen1 chipset and 4GB RAM lead to slow performance and occasional stuttering.
    • Camera Limitations: Photos lack detail in low light, and the 5MP front-facing camera is considered very basic.
    • Gaming Performance: Not suitable for intensive gaming; users report significant lag in titles like PUBG Mobile.
    • Audio Quality: Equipped with only a single bottom-firing speaker that lacks depth and clarity at high volumes.
    • Screen Resolution: The display is limited to HD+ (720p) quality, which may lack the sharpness found in rival models.
    • Charging Equipment: While it supports 45W fast charging, a compatible charger is often not included in the box.

    Expert reviews

    T
    techadvisor.com
    ?
    14/08/2025
    Oppo A40 review: Absurdly cheap, but for casual users only

    The Oppo A40 is identified by Tech Advisor as a highly affordable budget smartphone priced around £129, aimed at casual users who prioritize value over performance. Key pros include a premium design with an aluminum frame, military-grade (MIL-STD-810H) durability, a large 5,100mAh battery, and a 90Hz display. However, the device is held back by a slow Snapdragon 6s 4G Gen 1 chip,...Read more

    C
    cybershack.com.au
    ?
    21/10/2024
    OPPO A40 4G – a great 3G smartphone replacement (mini-review)

    The Oppo A40 4G is positioned as a durable, budget-friendly replacement for 3G phones, prioritizing longevity with MIL-STD 810H military-grade shock resistance and IP54 splash resistance. Key features include a 6.67-inch 90Hz display, 5100mAh battery with 45W charging, and "Splash Touch" technology for wet usability. While offering a 50MP main camera and expandable storage, the...Read more

    T
    techadvisor.com
    ?
    14/08/2025
    Oppo A40 review: Absurdly cheap, but for casual users only

    The Oppo A40 is identified by Tech Advisor as a highly affordable budget smartphone priced around £129, aimed at casual users who prioritize value over performance. Key pros include a premium design with an aluminum frame, military-grade (MIL-STD-810H) durability, a large 5,100mAh battery, and a 90Hz display. However, the device is held back by a slow Snapdragon 6s 4G Gen 1 chip,...Read more

    C
    cybershack.com.au
    ?
    21/10/2024
    OPPO A40 4G – a great 3G smartphone replacement (mini-review)

    The Oppo A40 4G is positioned as a durable, budget-friendly replacement for 3G phones, prioritizing longevity with MIL-STD 810H military-grade shock resistance and IP54 splash resistance. Key features include a 6.67-inch 90Hz display, 5100mAh battery with 45W charging, and "Splash Touch" technology for wet usability. While offering a 50MP main camera and expandable storage, the...Read more

    P
    pcwelt.de
    ?
    29/08/2025
    Oppo A40 Review: Absurdly Cheap, but Only Suitable for Casual Users

    PC-Welt’s review of the Oppo A40 describes it as an "absurdly cheap" entry-level phone, focusing on affordability and durability with its MIL-STD 810H shock resistance and appealing 6.67-inch, 90Hz LCD screen. While the display brightness is a highlight, the 720p resolution is considered low, notes the review. The device, which serves as a reliable option for light users, offers...Read more

    (Translated)Show original
    J
    journaldugeek.com
    ?
    03/12/2024
    Oppo launches the A40 smartphone and Enco Buds2 Pro in France

    Oppo lance en France le smartphone A40 et les écouteurs Enco Buds2 Pro, ciblant le segment entrée de gamme. L'Oppo A40 est un appareil résistant aux chocs et aux éclaboussures avec une bonne autonomie, mais sa fiche technique (écran HD+, absence de 5G) est modeste. Les Enco Buds2 Pro offrent un bon rapport qualité-prix et une longue autonomie, mais n'incluent pas la réduction de...Read more

    (Translated)Show original
    T
    technologyinsider.nl
    ?
    18/11/2024
    Oppo A40 review: A smartphone with a 50-megapixel camera for 140 euros

    The Oppo A40, priced around €140, is highlighted for its robust build, featuring MIL-STD-810H shock resistance, IP54 splash protection, and a 6.67-inch 90Hz display with 1,000 nits peak brightness. However, the device suffers from significant performance issues due to its entry-level Snapdragon 6s 4G Gen1 chip and 4GB of RAM, resulting in a sluggish user experience and a lack of 5G...Read more

    (Translated)Show original
    C
    consumentenbond.nl
    ?
    01/09/2024
    OPPO A40 - Sparkle Black - Test, Reviews & Prices

    The OPPO A40 Sparkle Black is a budget-friendly, entry-level smartphone featuring exceptional durability with MIL-STD-810H shock resistance and IP54 splash protection. Its 6.67-inch LCD display offers a 1,000-nit peak brightness but is limited to a lower 720p HD+ resolution, with performance powered by a Snapdragon 6s 4G Gen1 chipset. While suitable for daily tasks, the device can...Read more

    (Translated)Show original
    T
    technologyinsider.nl
    ?
    18/11/2024
    Oppo A40 review: A smartphone with a 50-megapixel camera for 140 euros

    The Oppo A40, priced around €140, is highlighted for its robust build, featuring MIL-STD-810H shock resistance, IP54 splash protection, and a 6.67-inch 90Hz display with 1,000 nits peak brightness. However, the device suffers from significant performance issues due to its entry-level Snapdragon 6s 4G Gen1 chip and 4GB of RAM, resulting in a sluggish user experience and a lack of 5G...Read more

    (Translated)Show original
    C
    consumentenbond.nl
    ?
    01/09/2024
    OPPO A40 - Sparkle Black - Test, Reviews & Prices

    The OPPO A40 Sparkle Black is a budget-friendly, entry-level smartphone featuring exceptional durability with MIL-STD-810H shock resistance and IP54 splash protection. Its 6.67-inch LCD display offers a 1,000-nit peak brightness but is limited to a lower 720p HD+ resolution, with performance powered by a Snapdragon 6s 4G Gen1 chipset. While suitable for daily tasks, the device can...Read more

    (Translated)Show original

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