In depth comparison and review of OPPO Reno4 5G and Samsung Galaxy S21 FE 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 Reno4 5G | Samsung Galaxy S21 FE 5G |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Manufacturer Model Number | CPH2091 | SM-G990B/DS | |
| Form Factor | Touch | Touch | |
| Height | 159.3 mm | 155.7 mm | OPPO Reno4 5G has greater height than Samsung Galaxy S21 FE 5G. |
| Width | 74 mm | 74.5 mm | Samsung Galaxy S21 FE 5G has greater width than OPPO Reno4 5G. |
| Depth | 7.8 mm | 7.9 mm | OPPO Reno4 5G is narrower than OPPO Reno4 5G. |
| Weight | 183 g | 177 g | Samsung Galaxy S21 FE 5G is lighter than OPPO Reno4 5G. |
| Body Colour | Space black | Galactic blue | Olive | Graphite | White | Lavender | |
| Protection | - | Dustproof, splashproof, water-resistant | |
| Waterproof (Water-resistant) | - | - | |
| IP rating | IP54 | IP68 | |
| SAR Value | 0.886 W/kg (head), 1.155 W/kg (body), 2.165 W/kg (limb) | 1.48 W/kg (body), 0.952 W/kg (head), 2.91 W/kg (limb) | |
| Connector Type | USB Type-C - 24 pin USB-C | USB Type-C - 24 pin USB-C | |
| SIM Card Type (Size) | Nano SIM | Nano SIM | |
| SIM Card Qty | Dual-SIM | Dual-SIM |
| DISPLAY | OPPO Reno4 5G | Samsung Galaxy S21 FE 5G |
|---|
| Display Type | OLED display | OLED display | |
|---|---|---|---|
| Display Technology | AMOLED | Infinity-O Dynamic AMOLED 2X | |
| Screen Size (Display Size) | 6.4" | 6.4" | Both phones have the same screen size. |
| Screen Resolution (Display Resolution) | 2400 x 1080 pixels | 2340 x 1080 pixels | OPPO Reno4 5G has better screen resolution than Samsung Galaxy S21 FE 5G. |
| Display Format | Full HD+ | Full HD+ | |
| Pixel Density | 409 ppi | 401 ppi | OPPO Reno4 5G has better pixel density than Samsung Galaxy S21 FE 5G. |
| Aspect Ratio | 20:9 | - | |
| Max Brightness | 800 cd/m² | - | |
| Colour Depth | 16.7 million colours | 16.7 million colours | Both phones have the same color depth. |
| Contrast Ratio | 800000:1 | - | |
| HDR Technology | - | HDR10+ | |
| Display Enhancement Technology | - | Eye Comfort Shield | |
| Display Refresh Rate | 60 Hz | 120 Hz | Samsung Galaxy S21 FE 5G has better refresh rate than OPPO Reno4 5G. |
| Display Features | DCI-P3 Wide colour gamut, Dark mode, 180Hz sampling rate | AOD(Always On Display), Infinity O display, Video Wallpaper | |
| Display Protection (Screen Protector) | Corning Gorilla Glass (scratch resistant glass) | Corning Gorilla Glass Victus (scratch resistant glass) |
| PROCESSOR | OPPO Reno4 5G | Samsung Galaxy S21 FE 5G |
|---|
| Processor Type (CPU) | Qualcomm Snapdragon 765G | - | |
|---|---|---|---|
| Clock Speed | 2.4 GHz | 2.84 GHz | Samsung Galaxy S21 FE 5G has higher clock speed than OPPO Reno4 5G. |
| Processor Core Qty | 8-core | 8-core | Both phones have the same number of phone cores. |
| Graphics System (GPU) | Qualcomm ADRENO 620 | - |
| MEMORY | OPPO Reno4 5G | Samsung Galaxy S21 FE 5G |
|---|
| RAM | LPDDR4X SDRAM - 8 GB | 6 GB | OPPO Reno4 5G has more RAM than Samsung Galaxy S21 FE 5G. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 128 GB | 128 GB | Both phones have the same internal memory capacity. |
| User Memory | - | 101.1 GB | |
| Memory Interface | UFS 2.1 | - |
| CAMERA | OPPO Reno4 5G | Samsung Galaxy S21 FE 5G |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 3 | 3 | |
|---|---|---|---|
| Sensor Resolution | 48 Megapixel | 12 Megapixel | OPPO Reno4 5G has better camera resolution than Samsung Galaxy S21 FE 5G. |
| Sensor Size | 1/2" | 1/1.76" | OPPO Reno4 5G has better camera sensor size than Samsung Galaxy S21 FE 5G. |
| Sensor Name | Sony Exmor RS IMX586 sensor | - | |
| Lens Type | - | Wide-angle lens | |
| Lens Aperture | F/1.7 | F/1.8 | OPPO Reno4 5G has better lens aperture than OPPO Reno4 5G. |
| Lens Construction | 6-element | - | |
| Field of View (FoV) | - | 79 degree(s) | |
| Pixel Size | 0.8 μm | 1.8 μm | Samsung Galaxy S21 FE 5G has larger camera pixel size than OPPO Reno4 5G. |
| Optical Image Stabiliser (OIS) | - | Optical Image Stabiliser (OIS) | Samsung Galaxy S21 FE 5G has optical stabilisation. |
| Focus Adjustment | Automatic | Automatic | |
| Laser Auto Focus | Yes | - | |
| Minimum Focal Length (Focal Distance) | 26 mm | - | |
| Optical Zoom | - | 3x | |
| Digital Zoom | - | 30x | |
| Special Effects | HDR, Bokeh effect | Face retouch, Grid Line | |
| HDR Mode | - | Auto HDR mode | |
| Camera Modes | Time-lapse mode, night mode, Expert Mode, Text, AI Beautify, AI Portait, Pano mode, Dazzle Colour Mode | Night mode, portrait mode | |
| Light Source | LED flash | LED flash | |
| Still Image Resolutions | 8000 x 6000 | - | |
| Video Resolutions | 1920 x 1080 (1080p) at 30 fps, 1920 x 1080 (1080p) at 60 fps, 1280 x 720 (720p) at 30 fps, Slo-mo video 1920 x 1080 (1080p) at 120 fps, Slo-mo video 1280 x 720 (720p) at 240 fps, 3840 x 2160 (4K) at 30 fps, 1280 x 720 (720p) at 60 fps | Slo-mo video 1280 x 720 (720p) at 240 fps, 3840 x 2160 (4K) at 60 fps, Slo-mo video 1280 x 720 (720p) at 960 fps | |
| Camera Features (Functions) | Noise reduction, Phase Detect Auto-Focus (PDAF), Electronic Image Stabiliser (EIS), Closed loop processing, 4-in-1 Pixel technology, Ultra Steady Video, contrast detection auto-focus (CDAF), laser detection auto focus (LDAF) | Dual recording |
| SECOND CAMERA |
|---|
| Sensor Resolution (2nd Camera) | 8 Megapixel | 12 Megapixel | Samsung Galaxy S21 FE 5G has better second camera resolution than OPPO Reno4 5G. |
|---|---|---|---|
| Lens Type (2nd Camera) | Ultra 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. |
| Lens Element Qty (2nd Camera) | 5-element | - | |
| Field of View (2nd Camera) | 119 degree(s) | 123 degree(s) | Samsung Galaxy S21 FE 5G has larger second camera lens field of view than OPPO Reno4 5G. |
| Pixel Size (2nd Camera) | - | 1.12 μm | |
| Minimum Focal Length (2nd Camera) | 16 mm | - | |
| Camera Functions (2nd Camera) | Monochrome | - | |
| Camera Modes (2nd Camera) | Ultra Night Mode 3.0 | - | |
| Camera Features (2nd Camera) | 5-piece lens, Ultra Steady Video Pro | - |
| THIRD CAMERA |
|---|
| Sensor Resolution (3rd Camera) | 2 Megapixel | 8 Megapixel | Samsung Galaxy S21 FE 5G has higher resolution third camera than OPPO Reno4 5G. |
|---|---|---|---|
| Lens Type (3rd Camera) | - | Telephoto lens | |
| Lens Aperture (3rd Camera) | F/2.4 | F/2.4 | Both phones have the same lens aperture of the third camera. |
| Lens Element Qty (3rd Camera) | 3-element | - | |
| Field of View (3rd Camera) | - | 32 degree(s) | |
| Pixel Size (3rd Camera) | - | 1 μm | |
| Camera Features (3rd Camera) | - | Space Zoom x30 |
| FRONT CAMERA |
|---|
| Number of Front Cameras | 2 | 1 | |
|---|---|---|---|
| Sensor Resolution (Front) | 32 Megapixel | 32 Megapixel | Both phones have the same front camera resolution. |
| Sensor Name (Front) | Sony Exmor RS IMX616 sensor | - | |
| Lens Aperture (Front) | F/2.4 | F/2.2 | Samsung Galaxy S21 FE 5G has better front lens aperture than OPPO Reno4 5G. |
| Lens Element Qty (Front) | 5-element | - | |
| Field of View (Front) | - | 81 degree(s) | |
| Pixel Size (Front) | 0.8 μm | 0.8 μm | Both phones have the same front camera pixel size. |
| Focus Adjustment | - | Focus free | |
| Camera Modes (Front) | Panorama, Time-lapse mode, Slow motion mode, night mode, Expert Mode, AI Beauty, Portrait | - | |
| Light Source (Front) | Display flash | - | |
| Still Image Resolutions (Front) | 6560 x 4928 | - | |
| Video Resolutions (Front) | 1920 x 1080 (1080p) at 30 fps, 1280 x 720 (720p) at 30 fps | - | |
| Camera Features (Front) | Electronic Image Stabiliser (EIS), 5P lens | - |
| SECOND FRONT CAMERA |
|---|
| Sensor Resolution (2nd Front) | 2 Megapixel | - | |
|---|---|---|---|
| Lens Aperture (2nd Front) | F/2.4 | - | |
| Pixel Size (2nd Front) | 1.75 μm | - | |
| Camera Functions (2nd Front) | Portait camera | - | |
| Camera Features (2nd Front) | 3-piece lens | - |
| BATTERY AND CHARGING | OPPO Reno4 5G | Samsung Galaxy S21 FE 5G |
|---|
| Battery Capacity (Battery Size) | 4020 mAh | 4500 mAh | Samsung Galaxy S21 FE 5G has larger battery capacity than OPPO Reno4 5G. |
|---|---|---|---|
| Fast Charging Technology | SuperVOOC 2.0 Flash Charge | Samsung Fast Charging | Both phones have fast charging technology. |
| Recharge Time (Charging Time) | 36 min | - | |
| Wireless Charging | - | Yes | Samsung Galaxy S21 FE 5G can be charged wirelessly. |
| Wireless Charging Standards | - | Wireless PowerShare | |
| Standby Time | 390 hours | - | |
| Talk Time | 1560 minutes | 2220 minutes | Samsung Galaxy S21 FE 5G has longer battery life when making calls than OPPO Reno4 5G. |
| Run Time Details | Standby: up to 390 hrs Talk: up to 1560 min Playback (Music): up to 37 hrs Playback (video): up to 17.1 hrs |
Talk (LTE): up to 2220 min Active online usage (LTE): up to 13 hrs Active online usage (Wi-Fi): up to 13 hrs Playback (video): up to 16 hrs Playback (audio): up to 79 hrs |
| CELLULAR | OPPO Reno4 5G | Samsung Galaxy S21 FE 5G |
|---|
| Technology | WCDMA (UMTS) / GSM | WCDMA (UMTS) / GSM | |
|---|---|---|---|
| Mobile Broadband Generation | 5G | 5G | Both phones have the same mobile network generation. |
| Operating System | ColorOS 7.2 (based on Android 10) | Android 12 | |
| Intelligent Assistant | - | Bixby | |
| Payment Technology | - | Samsung Pay | |
| Navigation | GPS, A-GPS, GLONASS, BeiDou, Galileo, QZSS | GPS, GLONASS, BeiDou, Galileo, QZSS |
| COMMUNICATIONS | OPPO Reno4 5G | Samsung Galaxy S21 FE 5G |
|---|
| Data Transmission | FDD-LTE, TDD-LTE, 5G NR FR1 | FDD-LTE, TDD-LTE, 5G NR FR1 | |
|---|---|---|---|
| 2G Band | 850 GSM, 900 GSM, 1800 GSM, 1900 GSM | 850 GSM, 900 GSM, 1800 GSM, 1900 GSM | |
| 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 12, Band 17, Band 18, Band 19, Band 20, Band 26, Band 28, Band 32, Band 38, Band 39, Band 40, Band 41, Band 66 | Band 1, Band 2, Band 3, Band 4, Band 5, Band 7, Band 8, Band 12, Band 17, Band 20, Band 26, Band 28, Band 32, Band 38, Band 40, Band 41, Band 66 | |
| 4G LTE Frequency | FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 900, FDD 700a, FDD 700b, 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 1700 - 2110 AWS-3 | FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 900, FDD 700a, FDD 700b, FDD 800 DD, FDD 850+, FDD 700 APT, FDD 1500 L, TDD 2600, TDD 2300, TDD 2500, FDD 1700 - 2110 AWS-3 | |
| 5G NR Band | N1, n3, n5, n7, n8, n20, n28, n38, n41, n77, n78, n40 | N1, n3, n5, n7, n8, n20, n28, n38, n41, n66, n78, n40 | |
| 5G NR Frequency | FDD 2100, FDD 1800, FDD 850, FDD 2600, FDD 900, FDD 800, FDD 700APT, TDD TD 2600, TDD TD 2500, TDD TD 3700, TDD TD 3500, TDD 2300 | FDD 2100, FDD 1800, FDD 850, FDD 2600, FDD 900, FDD 800, FDD 700APT, TDD TD 2600, TDD TD 2500, FDD AWS-3, TDD TD 3500, TDD 2300 | |
| Wireless Interface | IEEE 802.11a/b/g/n/ac | IEEE 802.11a/b/g/n/ac | |
| Bluetooth | Bluetooth 5.1 | Bluetooth 5.0 | |
| NFC | Yes | Yes | Both phones have an NFC reader for mobile payments. |
| MEDIA | OPPO Reno4 5G | Samsung Galaxy S21 FE 5G |
|---|
| Supported Digital Audio Standards | WAV, WMA, AAC, AMR, MP3, FLAC, OGG, APE (Monkey's Audio), apt-X, LDAC, MID, SBC, apt-X HD, APTX-TWS+ | WAV, AAC, AMR, MP3, FLAC, XMF, OGG, MIDI, APE (Monkey's Audio), M4A, DSF, MXMF, OGA, 3GA, AWB, IMY, RTTTL, RTX, OTA, DFF, MID | |
|---|---|---|---|
| Supported Digital Video Standards | MKV, FLV, AVI, MOV, WMV, 3GP, MP4 | MKV, FLV, AVI, 3GP, M4V, WebM, 3G2, MP4 | |
| Sound Enhancements | Dolby Atmos sound technology | Dolby Digital Plus sound, Dolby Atmos sound technology, Surround sound, stereo speakers tuned by AKG, Dolby Digital sound |
| FEATURES | OPPO Reno4 5G | Samsung Galaxy S21 FE 5G |
|---|
| Phone Functions | Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert | - | |
|---|---|---|---|
| Sensors | Accelerometer, ambient light sensor, proximity sensor, pedometer, gyro sensor, geomagnetic sensor, gravity sensor | Accelerometer, proximity sensor, barometer, gyro sensor, hall sensor, geomagnetic sensor, light sensor | |
| Security Devices | Fingerprint reader (under display) | Fingerprint reader | |
| Additional Phone Features | MU-MIMO technology, Google Lens | MIMO technology, Fast Charging, Samsung KNOX, Samsung DeX support, Samsung Smart Switch, Game mode |
| OTHERS | OPPO Reno4 5G | Samsung Galaxy S21 FE 5G |
|---|
| Included Accessories | Headphones, power adapter, SIM card removal tool, USB-C cable, protective case | SIM card removal tool, USB-C cable | |
|---|---|---|---|
| Compliant Standards | IP54, TUV Rheinland Certified Safe Fast-Charge System | IP68 | |
| Max Depth of Water Resistance | - | 1.5 m |
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