In depth comparison and review of OPPO A9 2020 and Samsung Galaxy S21 5G. Compare sizes, cameras, batteries, memory, and other important specifications and features to easily choose the right phone for you. Our goal is to help you uncover differences between the products and find the phone that will best fit your needs.
| DESIGN AND DIMENSIONS | OPPO A9 2020 | Samsung Galaxy S21 5G |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Manufacturer Model Number | CPH1941 | SM-G991U1 | |
| Form Factor | Touch | Touch | |
| Height | 163.6 mm | 151.7 mm | OPPO A9 2020 has greater height than Samsung Galaxy S21 5G. |
| Width | 75.6 mm | 71.2 mm | OPPO A9 2020 has greater width than Samsung Galaxy S21 5G. |
| Depth | 9.1 mm | 7.9 mm | Samsung Galaxy S21 5G is narrower than OPPO A9 2020. |
| Weight | 195 g | 171 g | Samsung Galaxy S21 5G is lighter than OPPO A9 2020. |
| Body Colour | Marine green | Space purple | Phantom grey | Phantom white | |
| Body Material | 3D glass | - | |
| Protection | - | Dustproof, splashproof, water-resistant | |
| Waterproof (Water-resistant) | - | Yes | Samsung Galaxy S21 5G is waterproof. |
| IP rating | - | IP68 | |
| SAR Value | 0.976 W/kg (body), 0.847 W/kg (head), 2.118 W/kg (limb) | 1.58 W/kg (simultaneous), 1.11 W/kg (wireless router), 1.08 W/kg (body), 0.74 W/kg (head) | |
| Connector Type | USB Type-C - 24 pin USB-C Handset jack - mini-phone 3.5mm |
USB Type-C - 24 pin USB-C | |
| SIM Card Type (Size) | Nano SIM | Nano SIM, Electronic SIM card (e-SIM) | |
| SIM Card Qty | Dual-SIM | Dual-SIM |
| DISPLAY | OPPO A9 2020 | Samsung Galaxy S21 5G |
|---|
| Display Type | LCD display | OLED display | |
|---|---|---|---|
| Display Technology | TFT | Infinity-O Dynamic AMOLED 2X | |
| Screen Size (Display Size) | 6.5" | 6.2" | OPPO A9 2020 has larger screen size than Samsung Galaxy S21 5G. |
| Screen Resolution (Display Resolution) | 1600 x 720 pixels | 2400 x 1080 pixels | Samsung Galaxy S21 5G has better screen resolution than OPPO A9 2020. |
| Display Format | - | Full HD+ | |
| Pixel Density | 269 ppi | 421 ppi | Samsung Galaxy S21 5G has better pixel density than OPPO A9 2020. |
| Max Brightness | 480 cd/m² | - | |
| Colour Depth | 16.7 million colours | 16.7 million colours | Both phones have the same color depth. |
| Contrast Ratio | 1500:1 | - | |
| HDR | - | Yes | Samsung Galaxy S21 5G has HDR. |
| HDR Technology | - | HDR10+ | |
| Display Enhancement Technology | Blue light filter | Eye Comfort Shield | |
| Display Refresh Rate | - | 120 Hz | |
| Display Features | In-Cell Display Technology, Sunlight screen | AOD(Always On Display), Video Wallpaper | |
| Display Protection (Screen Protector) | - | Corning Gorilla Glass Victus (scratch resistant glass) |
| PROCESSOR | OPPO A9 2020 | Samsung Galaxy S21 5G |
|---|
| Processor Type (CPU) | Qualcomm Snapdragon 665 | Qualcomm Snapdragon 888 | |
|---|---|---|---|
| Clock Speed | - | 2.84 GHz | |
| Processor Core Qty | - | 8-core | |
| Graphics System (GPU) | Qualcomm ADRENO 610 | - |
| MEMORY | OPPO A9 2020 | Samsung Galaxy S21 5G |
|---|
| RAM | LPDDR4X SDRAM - 4 GB | LPDDR5 SDRAM - 8 GB | Samsung Galaxy S21 5G has more RAM than OPPO A9 2020. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 128 GB | 128 GB | Both phones have the same internal memory capacity. |
| User Memory | - | 101.2 GB | |
| Memory Interface | UFS 2.1 | - | |
| Supported Flash Memory Cards (Expandable Memory) | microSDHC, microSDXC - up to 256 GB | - |
| CAMERA | OPPO A9 2020 | Samsung Galaxy S21 5G |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 4 | 3 | |
|---|---|---|---|
| Sensor Resolution | 48 Megapixel | 12 Megapixel | OPPO A9 2020 has better camera resolution than Samsung Galaxy S21 5G. |
| Sensor Size | 1/2.25" | 1/1.76" | OPPO A9 2020 has better camera sensor size than Samsung Galaxy S21 5G. |
| Sensor Type | CMOS | - | |
| Lens Type | - | Wide-angle lens | |
| Lens Aperture | F/1.8 | F/1.8 | Both phones have the same camera lens aperture. |
| Field of View (FoV) | - | 79 degree(s) | |
| Pixel Size | 0.8 μm | 1.8 μm | Samsung Galaxy S21 5G has larger camera pixel size than OPPO A9 2020. |
| Optical Image Stabiliser (OIS) | - | Optical Image Stabiliser (OIS) | Samsung Galaxy S21 5G has optical stabilisation. |
| Focus Adjustment | Automatic | Automatic | |
| Laser Auto Focus | - | Yes | |
| Optical Zoom | - | 3x | |
| Digital Zoom | - | 30x | |
| Self-Timer Delay | - | Yes | |
| Special Effects | - | Face retouch, Grid Line | |
| HDR Mode | - | Auto HDR mode | |
| Camera Modes | Panorama, Time-lapse mode, Slow motion mode, Beauty mode, Expert Mode, Portrait, Night, Ultra Night Mode 2.0 | Panorama, Slow motion mode, Pro mode, HYPERLAPSE, Super Slow-mo, Flowers, Greenery, Trees, Sky, Beaches, Watersides, Snow, Backlit, Text, Food, Face, Baby, Person, Dog, Cat, People, Sunset, Sunrise, City, Waterfall, Scenery, Stage, Vehicles, Drinks, Animal, Shoes, Indoor, Clothes, Night view, Portrait, Night, Motion Photo, Mountain, Single Take, Pro Video, Portrait video, Director's View | |
| Light Source | LED flash | High CRI LED flash | |
| Video Resolutions | 1920 x 1080 (1080p) at 30 fps, 1280 x 720 (720p) at 30 fps, 3840 x 2160 (4K) at 30 fps | 1920 x 1080 (1080p) at 60 fps, 1280 x 720 (720p) at 30 fps, 3840 x 2160 (4K) at 60 fps, Super slow motion video 1280 x 720 (720p) at 960 fps, Slo-mo video 1920 x 1080 (1080p) at 240 fps, 7680 x 4320 (8K) at 24 fps, Hyperlapse 4K video support at 30 fps, Super Steady 1080p video support at 60 fps | |
| Camera Features (Functions) | Electronic Image Stabiliser (EIS) | Playback zoom, Motion photo, blink detection, QR-code scanner, VDIS (Video Digital Image Stabilisation), Tracking AF, Video location tags, Scene Optimiser, Lens smudge, Flaw detection, Shot suggestions, blur detection, HDR10+ recording, Super steady, Super Speed Dual Pixel AF, Quick Measure, Zoom-In Mic, HEIF image capture, Space Zoom, Take 33MP still photos while playing 8K video, Hybrid Optic Zoom 3x, Super Resolution Zoom up to 30x, Digital zoom up to 12x for video, AR Doodle, HEVC (High Efficiency Video coding) support, Microphone Control (Pro Video only) |
| SECOND CAMERA |
|---|
| Sensor Resolution (2nd Camera) | 8 Megapixel | 12 Megapixel | Samsung Galaxy S21 5G has better second camera resolution than OPPO A9 2020. |
|---|---|---|---|
| Sensor Size (2nd Camera) | 1/4.0" | - | |
| Lens Type (2nd Camera) | Ultra wide-angle lens | Ultra wide-angle lens | |
| Lens Aperture (2nd Camera) | F/2.25 | F/2.2 | Samsung Galaxy S21 5G has better second camera lens aperture than OPPO A9 2020. |
| Field of View (2nd Camera) | 119 degree(s) | 120 degree(s) | Samsung Galaxy S21 5G has larger second camera lens field of view than OPPO A9 2020. |
| Pixel Size (2nd Camera) | 1.12 μm | 1.4 μm | Samsung Galaxy S21 5G has larger second camera pixel size than OPPO A9 2020. |
| THIRD CAMERA |
|---|
| Sensor Resolution (3rd Camera) | 2 Megapixel | 64 Megapixel | Samsung Galaxy S21 5G has higher resolution third camera than OPPO A9 2020. |
|---|---|---|---|
| Sensor Size (3rd Camera) | 1/5" | 1/1.72" | OPPO A9 2020 has better third camera sensor size than Samsung Galaxy S21 5G. |
| Lens Type (3rd Camera) | - | Telephoto lens | |
| Lens Aperture (3rd Camera) | F/2.4 | F/2.0 | Samsung Galaxy S21 5G has better third camera lens aperture than OPPO A9 2020. |
| Field of View (3rd Camera) | - | 76 degree(s) | |
| Pixel Size (3rd Camera) | 1.75 μm | 0.8 μm | OPPO A9 2020 has larger third camera pixel size than Samsung Galaxy S21 5G. |
| Optical Image Stabiliser (OIS) | - | Optical Image Stabiliser (OIS) | Samsung Galaxy S21 5G has optical stabilisation of the third camera. |
| FOURTH CAMERA |
|---|
| Sensor Resolution (4th Camera) | 2 Megapixel | - | |
|---|---|---|---|
| Sensor Size (4th Camera) | 1/5" | - | |
| Lens Aperture (4th Camera) | F/2.4 | - | |
| Pixel Size (4th Camera) | 1.75 μm | - |
| FRONT CAMERA |
|---|
| Number of Front Cameras | 1 | 1 | |
|---|---|---|---|
| Sensor Resolution (Front) | 16 Megapixel | 10 Megapixel | OPPO A9 2020 has better front camera resolution than Samsung Galaxy S21 5G. |
| Sensor Size (Front) | 1/3.1" | - | |
| Lens Aperture (Front) | F/2.0 | F/2.2 | OPPO A9 2020 has better front lens aperture than OPPO A9 2020. |
| Field of View (Front) | - | 80 degree(s) | |
| Pixel Size (Front) | 1 μm | 1.22 μm | Samsung Galaxy S21 5G has larger front camera pixel size than OPPO A9 2020. |
| Focus Adjustment | - | Automatic | |
| Camera Modes (Front) | AI Beauty | - | |
| Video Resolutions (Front) | 1920 x 1080 (1080p) at 30 fps, 1280 x 720 (720p) at 30 fps | - | |
| Camera Features (Front) | - | Dual Pixel AF |
| BATTERY AND CHARGING | OPPO A9 2020 | Samsung Galaxy S21 5G |
|---|
| Battery Capacity (Battery Size) | 5000 mAh | 4000 mAh | OPPO A9 2020 has larger battery capacity than Samsung Galaxy S21 5G. |
|---|---|---|---|
| Fast Charging Technology | - | Qualcomm Quick Charge 2.0, Adaptive Fast Charging, Power Delivery 3.0 | Samsung Galaxy S21 5G has fast charging technology. |
| Wireless Charging | - | Yes | Samsung Galaxy S21 5G can be charged wirelessly. |
| Wireless Charging Standards | - | WPC, Qi, Fast Wireless Charging 2.0, Wireless PowerShare | |
| Standby Time | 450 hours | - | |
| Talk Time | 2700 minutes | 1800 minutes | OPPO A9 2020 has longer battery life when making calls than Samsung Galaxy S21 5G. |
| Run Time Details | Standby: up to 450 hrs Talk: up to 2700 min |
Talk (LTE): up to 1800 min Active online usage (LTE): up to 14 hrs Active online usage (Wi-Fi): up to 15 hrs Playback (wireless video): up to 19 hrs Playback (wireless audio): up to 72 hrs |
| CELLULAR | OPPO A9 2020 | Samsung Galaxy S21 5G |
|---|
| Technology | WCDMA (UMTS) / GSM | CDMA2000 1X / GSM / WCDMA (UMTS) | |
|---|---|---|---|
| Mobile Broadband Generation | 4G | 5G | Samsung Galaxy S21 5G has more advanced generation mobile network. |
| Operating System | ColorOS 6.0.1 (based on Android 9) | Android 11 | |
| Intelligent Assistant | - | Bixby | |
| Payment Technology | - | Samsung Pay | |
| Navigation | GPS, A-GPS, GLONASS, BeiDou, Galileo | GPS, GLONASS, Galileo |
| COMMUNICATIONS | OPPO A9 2020 | Samsung Galaxy S21 5G |
|---|
| Data Transmission | GPRS, EDGE, HSDPA, HSUPA, HSPA+, FDD-LTE, TDD-LTE | FDD-LTE, TDD-LTE, 5G NR FR1, 5G NR FR2 | |
|---|---|---|---|
| 2G Band | 850 GSM, 900 GSM, 1800 GSM, 1900 GSM | 850 GSM, 900 GSM, 1800 GSM, 1900 GSM, 800 CDMA2000 1X, 1900 CDMA2000 1X | |
| 3G UMTS Band | Band 1, Band 2, Band 4, Band 5, Band 6, Band 8, Band 19 | Band 1, Band 2, Band 4, Band 5, Band 8 | |
| 3G UMTS Frequency | 2100, 1900, 1700, 850, 800, 900, 800 | 2100, 1900, 1700, 850, 900 | |
| 4G LTE Band | Band 1, Band 2, Band 3, Band 4, Band 5, Band 7, Band 8, Band 18, Band 19, Band 20, Band 26, Band 28, Band 38, Band 39, Band 40, Band 41 | Band 1, Band 2, Band 3, Band 4, Band 5, Band 7, Band 8, Band 12, Band 13, Band 14, Band 18, Band 19, Band 20, Band 25, Band 26, Band 28, Band 30, Band 38, Band 39, Band 40, Band 41, Band 46, Band 48, Band 66, Band 71 | |
| 4G LTE Frequency | FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 900, FDD 800 lower, FDD 800 upper, FDD 800 DD, FDD 850+, FDD 700 APT, TDD 2600, TDD 1900, TDD 2300, TDD 2500 | FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 900, FDD 700a, FDD 700c, FDD 700 PS, FDD 800 lower, FDD 800 upper, FDD 800 DD, FDD 1900+, FDD 850+, FDD 700 APT, FDD 2300 WCS, TDD 2600, TDD 1900, TDD 2300, TDD 2500, TDD 5150, TDD 3600, FDD 1700 - 2110 AWS-3, FDD 600 | |
| 5G NR Band | - | N41, n71, n260, n261 | |
| 5G NR Frequency | - | TDD TD 2500, FDD 600, TDD 39GHz, TDD 28GHz | |
| Wireless Interface | IEEE 802.11a/b/g/n/ac | IEEE 802.11a/b/g/n/ac/ax | |
| Bluetooth | Bluetooth 5.0 | Bluetooth 5.0 | |
| NFC | Yes | Yes | Both phones have an NFC reader for mobile payments. |
| Messaging Services | SMS, MMS | - |
| MEDIA | OPPO A9 2020 | Samsung Galaxy S21 5G |
|---|
| Supported Digital Audio Standards | - | WAV, AAC, PCM, AMR, MP3, FLAC, XMF, OGG, MIDI, APE (Monkey's Audio), M4A, DSF, MXMF, OGA, 3GA, AWB, IMY, RTTTL, RTX, OTA, DFF, MID, DSD64, DSD128 | |
|---|---|---|---|
| Supported Digital Video Standards | - | MKV, FLV, AVI, 3GP, M4V, WebM, 3G2, MP4 | |
| Sound Enhancements | Dolby Atmos sound technology, Hi-Res audio | Dolby Digital Plus sound, Dolby Atmos sound technology, Surround sound, stereo speakers tuned by AKG, Dolby Digital sound |
| FEATURES | OPPO A9 2020 | Samsung Galaxy S21 5G |
|---|
| Phone Functions | Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert | Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert | |
|---|---|---|---|
| Sensors | Accelerometer, ambient light sensor, proximity sensor, gyro sensor, geomagnetic sensor | Accelerometer, ambient light sensor, proximity sensor, barometer, gyro sensor, hall sensor, geomagnetic sensor | |
| Security Devices | Face recognition | Fingerprint reader (under display), face recognition | |
| Additional Phone Features | Multitasking, Game Boost 2.0 | MIMO technology, Screen Write, notification flashlight, Smart Select, Fast Charging, Samsung KNOX, Smart View, Live message, Screen off memo, Samsung DeX support, Bixby Vision, TalkBack, Dual Audio, Bixby Routines, Intelligent Performance Enhancer, Bixby key, Bluetooth Scalable Codec, Samsung Knox Vault, Private Share function, Enhanced Game Booster, Air Command |
| OTHERS | OPPO A9 2020 | Samsung Galaxy S21 5G |
|---|
| Included Accessories | Headphones, power adapter, SIM card removal tool, cover, USB-C cable, screen protector (pre-applied) | SIM card removal tool, USB-C to USB-C cable | |
|---|---|---|---|
| Compliant Standards | - | VDE, IP68, HAC (Hearing Aid Compatible), SGS Eye Care Display Certification | |
| Max Depth of Water Resistance | - | 1.5 m |
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