In depth comparison and review of OPPO Reno2 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 Reno2 | Samsung Galaxy S21 5G |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Manufacturer Model Number | CPH1907 | SM-G991U1 | |
| Form Factor | Touch | Touch | |
| Height | 160 mm | 151.7 mm | OPPO Reno2 has greater height than Samsung Galaxy S21 5G. |
| Width | 74.3 mm | 71.2 mm | OPPO Reno2 has greater width than Samsung Galaxy S21 5G. |
| Depth | 9.5 mm | 7.9 mm | Samsung Galaxy S21 5G is narrower than OPPO Reno2. |
| Weight | 189 g | 171 g | Samsung Galaxy S21 5G is lighter than OPPO Reno2. |
| Body Colour | Ocean blue | Luminous black | Phantom grey | Phantom white | |
| Body Material | Corning Gorilla Glass 5 | - | |
| Protection | - | Dustproof, splashproof, water-resistant | |
| Waterproof (Water-resistant) | - | Yes | Samsung Galaxy S21 5G is waterproof. |
| IP rating | - | IP68 | |
| SAR Value | 1.03 W/kg (body), 0.89 W/kg (head), 2.05 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 Reno2 | Samsung Galaxy S21 5G |
|---|
| Display Type | OLED display | OLED display | |
|---|---|---|---|
| Display Technology | AMOLED | Infinity-O Dynamic AMOLED 2X | |
| Screen Size (Display Size) | 6.5" | 6.2" | OPPO Reno2 has larger screen size than Samsung Galaxy S21 5G. |
| Screen Resolution (Display Resolution) | 2400 x 1080 pixels | 2400 x 1080 pixels | Both phones have the same screen resolution. |
| Display Format | - | Full HD+ | |
| Pixel Density | 401 ppi | 421 ppi | Samsung Galaxy S21 5G has better pixel density than OPPO Reno2. |
| Max Brightness | 800 cd/m² | - | |
| Colour Depth | 16.7 million colours | 16.7 million colours | Both phones have the same color depth. |
| Contrast Ratio | 1400000:1 | - | |
| HDR | - | Yes | Samsung Galaxy S21 5G has HDR. |
| HDR Technology | - | HDR10+ | |
| Display Enhancement Technology | OnCell technology | Eye Comfort Shield | |
| Display Refresh Rate | - | 120 Hz | |
| Display Features | - | AOD(Always On Display), Video Wallpaper | |
| Display Protection (Screen Protector) | Corning Gorilla Glass 6 (scratch resistant glass) | Corning Gorilla Glass Victus (scratch resistant glass) |
| PROCESSOR | OPPO Reno2 | Samsung Galaxy S21 5G |
|---|
| Processor Type (CPU) | Qualcomm Snapdragon 730G | Qualcomm Snapdragon 888 | |
|---|---|---|---|
| Clock Speed | - | 2.84 GHz | |
| Processor Core Qty | - | 8-core | |
| Graphics System (GPU) | Qualcomm ADRENO 618 | - |
| MEMORY | OPPO Reno2 | Samsung Galaxy S21 5G |
|---|
| RAM | 8 GB | LPDDR5 SDRAM - 8 GB | Both phones have the same RAM size. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 256 GB | 128 GB | OPPO Reno2 has more internal memory than Samsung Galaxy S21 5G. |
| User Memory | - | 101.2 GB |
| CAMERA | OPPO Reno2 | Samsung Galaxy S21 5G |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 4 | 3 | |
|---|---|---|---|
| Sensor Resolution | 48 Megapixel | 12 Megapixel | OPPO Reno2 has better camera resolution than Samsung Galaxy S21 5G. |
| Sensor Size | 1/2" | 1/1.76" | OPPO Reno2 has better camera sensor size than Samsung Galaxy S21 5G. |
| Sensor Name | Sony Exmor RS IMX586 sensor | - | |
| Lens Type | - | Wide-angle lens | |
| Lens Aperture | F/1.7 | F/1.8 | OPPO Reno2 has better lens aperture than OPPO Reno2. |
| Lens Construction | 6-element | - | |
| 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 Reno2. |
| Optical Image Stabiliser (OIS) | Optical Image Stabiliser (OIS) | Optical Image Stabiliser (OIS) | Both phones have optical image stabilization. |
| Focus Adjustment | Automatic | Automatic | |
| Laser Auto Focus | - | Yes | |
| Optical Zoom | - | 3x | |
| Digital Zoom | 20x | 30x | Samsung Galaxy S21 5G has better digital zoom than OPPO Reno2. |
| Self-Timer Delay | - | Yes | |
| Special Effects | HDR | Face retouch, Grid Line | |
| HDR Mode | - | Auto HDR mode | |
| Camera Modes | Panorama, Time-lapse mode, Slow motion mode, Professional mode, Night scene mode, Portrait, Fine-Tuned Performance, Ultra dark mode, Ultra Macro Mode | 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 | Dual LED flash | High CRI LED flash | |
| Video Resolutions | 1920 x 1080 (1080p) at 30 fps, 1920 x 1080 (1080p) at 60 fps, 1280 x 720 (720p) at 30 fps, 3840 x 2160 (4K) at 30 fps, 1280 x 720 (720p) at 60 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), 5x Hybrid Zoom, NPU Acceleration, AI Noise Reduction | 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 Reno2. |
|---|---|---|---|
| Sensor Size (2nd Camera) | 1/3.2" | - | |
| Lens Type (2nd Camera) | Wide-angle lens | Ultra wide-angle lens | |
| Lens Aperture (2nd Camera) | F/2.2 | F/2.2 | Both phones have the same second camera lens aperture. |
| Field of View (2nd Camera) | 116 degree(s) | 120 degree(s) | Samsung Galaxy S21 5G has larger second camera lens field of view than OPPO Reno2. |
| Pixel Size (2nd Camera) | 1.4 μm | 1.4 μm | Both phones have the same second camera pixel size. |
| THIRD CAMERA |
|---|
| Sensor Resolution (3rd Camera) | 13 Megapixel | 64 Megapixel | Samsung Galaxy S21 5G has higher resolution third camera than OPPO Reno2. |
|---|---|---|---|
| Sensor Size (3rd Camera) | 1/3.4" | 1/1.72" | OPPO Reno2 has better third camera sensor size than Samsung Galaxy S21 5G. |
| Lens Type (3rd Camera) | Telephoto lens | Telephoto lens | |
| Lens Aperture (3rd Camera) | F/2.4 | F/2.0 | Samsung Galaxy S21 5G has better third camera lens aperture than OPPO Reno2. |
| Field of View (3rd Camera) | - | 76 degree(s) | |
| Pixel Size (3rd Camera) | 1 μm | 0.8 μm | OPPO Reno2 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 Type (4th Camera) | Bokeh lens | - | |
| Lens Aperture (4th Camera) | F/2.4 | - | |
| Pixel Size (4th Camera) | 1.75 μm | - |
| FRONT CAMERA |
|---|
| Number of Front Cameras | 1 | 1 | |
|---|---|---|---|
| Front Camera Design | Pop-up | - | |
| Sensor Resolution (Front) | 16 Megapixel | 10 Megapixel | OPPO Reno2 has better front camera resolution than Samsung Galaxy S21 5G. |
| Lens Aperture (Front) | F/2.0 | F/2.2 | OPPO Reno2 has better front lens aperture than OPPO Reno2. |
| Lens Element Qty (Front) | 5-element | - | |
| Field of View (Front) | - | 80 degree(s) | |
| Pixel Size (Front) | - | 1.22 μm | |
| Focus Adjustment | - | Automatic | |
| Special Effects (Front) | Video bokeh effect | - | |
| Camera Modes (Front) | Portrait Mode 2.0, AI Beauty | - | |
| Video Resolutions (Front) | 1920 x 1080 (1080p) at 30 fps | - | |
| Camera Features (Front) | - | Dual Pixel AF |
| BATTERY AND CHARGING | OPPO Reno2 | Samsung Galaxy S21 5G |
|---|
| Battery Capacity (Battery Size) | 4000 mAh | 4000 mAh | Both phones have the same battery capacity. |
|---|---|---|---|
| Fast Charging Technology | VOOC Flash Charge technology 3.0 | Qualcomm Quick Charge 2.0, Adaptive Fast Charging, Power Delivery 3.0 | Both phones have 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 | |
| Talk Time | - | 1800 minutes | |
| Run Time Details | Gaming: up to 8 hrs Playback (video): up to 13 hrs |
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 Reno2 | 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 6.1 (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 Reno2 | 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 32, 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, FDD 1500 L, 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 Reno2 | 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 Reno2 | 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, electromagnetic compass | Accelerometer, ambient light sensor, proximity sensor, barometer, gyro sensor, hall sensor, geomagnetic sensor | |
| Security Devices | Fingerprint reader (under display) | Fingerprint reader (under display), face recognition | |
| Additional Phone Features | Fingerprint 3.0, Game Boost 2.0, SLA Dual Channel Network 2.0, cooling gel | 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 Reno2 | Samsung Galaxy S21 5G |
|---|
| Included Accessories | Headset, carrying case, USB cable, power adapter, SIM card removal tool, screen protector (pre-applied) | SIM card removal tool, USB-C to USB-C cable | |
|---|---|---|---|
| Compliant Standards | TUV Rheinland Full Care Display Certification | VDE, IP68, HAC (Hearing Aid Compatible), SGS Eye Care Display Certification | |
| Max Depth of Water Resistance | - | 1.5 m |
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