Detailed comparison and review of Samsung Galaxy S21 FE 5G and OPPO A57s. With our comprehensive overview, you can simply compare sizes, functions, but also other key features of both phones and easily decide which one is the right choice for you. Our goal is to help you identify the main differences between products and find the phone that best fits your needs and expectations.
| DESIGN AND DIMENSIONS | Samsung Galaxy S21 FE 5G | OPPO A57s |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Manufacturer Model Number | SM-G990B/DS | CPH2385 | |
| Form Factor | Touch | Touch | |
| Height | 155.7 mm | 163.74 mm | OPPO A57s has greater height than Samsung Galaxy S21 FE 5G. |
| Width | 74.5 mm | 75.03 mm | OPPO A57s has greater width than Samsung Galaxy S21 FE 5G. |
| Depth | 7.9 mm | 7.99 mm | Samsung Galaxy S21 FE 5G is narrower than Samsung Galaxy S21 FE 5G. |
| Weight | 177 g | 187 g | Samsung Galaxy S21 FE 5G is lighter than Samsung Galaxy S21 FE 5G. |
| Body Colour | Olive | Graphite | White | Lavender | Starry black | |
| Body Material | - | Composite polymer | |
| Protection | Dustproof, splashproof, water-resistant | - | |
| Waterproof (Water-resistant) | - | - | OPPO A57s is waterproof. |
| IP rating | IP68 | IPX4 | |
| SAR Value | 1.48 W/kg (body), 0.952 W/kg (head), 2.91 W/kg (limb) | 1.015 W/kg (body), 0.957 W/kg (head), 2.399 W/kg (limb) | |
| Connector Type | USB Type-C - 24 pin USB-C | Headset jack - mini-phone 3.5mm USB Type-C - 24 pin USB-C |
|
| SIM Card Type (Size) | Nano SIM | Nano SIM | |
| SIM Card Qty | Dual-SIM | Dual-SIM | |
| SIM Card Configuration Details | - | Nano SIM + nano SIM/microSD |
| DISPLAY | Samsung Galaxy S21 FE 5G | OPPO A57s |
|---|
| Display Type | OLED display | LCD display | |
|---|---|---|---|
| Display Technology | Infinity-O Dynamic AMOLED 2X | LCD | |
| Screen Size (Display Size) | 6.4" | 6.56" | OPPO A57s has larger screen size than Samsung Galaxy S21 FE 5G. |
| Screen Resolution (Display Resolution) | 2340 x 1080 pixels | 1612 x 720 pixels | Samsung Galaxy S21 FE 5G has better screen resolution than OPPO A57s. |
| Display Format | Full HD+ | HD+ | |
| Pixel Density | 401 ppi | 269 ppi | Samsung Galaxy S21 FE 5G has better pixel density than OPPO A57s. |
| Aspect Ratio | - | 20.1:9 | |
| Max Brightness | - | 600 cd/m² | |
| Colour Depth | 16.7 million colours | 16.7 million colours | Both phones have the same color depth. |
| Contrast Ratio | - | 1500:1 | |
| HDR Technology | HDR10+ | - | |
| Display Enhancement Technology | Eye Comfort Shield | - | |
| Display Refresh Rate | 120 Hz | 60 Hz | Samsung Galaxy S21 FE 5G has better refresh rate than OPPO A57s. |
| Touch Sampling Rate | - | 60 Hz | |
| Display Features | AOD(Always On Display), Infinity O display, Video Wallpaper | Night mode, Eye comfort mode, 96% NTSC | |
| Display Protection (Screen Protector) | Corning Gorilla Glass Victus (scratch resistant glass) | Panda Glass MN228 |
| PROCESSOR | Samsung Galaxy S21 FE 5G | OPPO A57s |
|---|
| Processor Type (CPU) | - | MediaTek Helio G35 | |
|---|---|---|---|
| Clock Speed | 2.84 GHz | 2.3 GHz | Samsung Galaxy S21 FE 5G has higher clock speed than OPPO A57s. |
| Processor Core Qty | 8-core | 8-core | Both phones have the same number of phone cores. |
| Graphics System (GPU) | - | IMG GE8320 |
| MEMORY | Samsung Galaxy S21 FE 5G | OPPO A57s |
|---|
| RAM | 6 GB | LPDDR4X SDRAM - 4 GB | Samsung Galaxy S21 FE 5G has more RAM than OPPO A57s. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 128 GB | 128 GB | Both phones have the same internal memory capacity. |
| User Memory | 101.1 GB | - | |
| Memory Interface | - | eMMC 5.1 | |
| Supported Flash Memory Cards (Expandable Memory) | - | microSDHC, microSD, microSDXC - up to 1 TB |
| CAMERA | Samsung Galaxy S21 FE 5G | OPPO A57s |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 3 | 2 | |
|---|---|---|---|
| Sensor Resolution | 12 Megapixel | 50 Megapixel | OPPO A57s has better camera resolution than Samsung Galaxy S21 FE 5G. |
| Sensor Size | 1/1.76" | 1/2.76" | OPPO A57s has better camera sensor size than Samsung Galaxy S21 FE 5G. |
| Sensor Name | - | Samsung S5KJN1 | |
| Lens Type | Wide-angle lens | - | |
| Lens Aperture | F/1.8 | F/1.8 | Both phones have the same camera lens aperture. |
| Lens Construction | - | 5-element | |
| Field of View (FoV) | 79 degree(s) | 77 degree(s) | Samsung Galaxy S21 FE 5G has larger lens field of view than OPPO A57s. |
| Pixel Size | 1.8 μm | 0.64 μm | Samsung Galaxy S21 FE 5G has larger camera pixel size than OPPO A57s. |
| Optical Image Stabiliser (OIS) | Optical Image Stabiliser (OIS) | - | Samsung Galaxy S21 FE 5G has optical stabilisation. |
| Focus Adjustment | Automatic | Automatic | |
| Minimum Focal Length (Focal Distance) | - | 27 mm | |
| Optical Zoom | 3x | - | |
| Digital Zoom | 30x | 5x | Samsung Galaxy S21 FE 5G has better digital zoom than OPPO A57s. |
| Special Effects | Face retouch, Grid Line | Stickers | |
| HDR Mode | Auto HDR mode | - | |
| Camera Modes | Night mode, portrait mode | Panorama, Time-lapse mode, Pro mode, Portrait, Night | |
| Light Source | LED flash | LED flash | |
| Video Resolutions | 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 | 1920 x 1080 (1080p) at 30 fps, 1280 x 720 (720p) at 30 fps | |
| Camera Features (Functions) | Dual recording | - |
| SECOND CAMERA |
|---|
| Sensor Resolution (2nd Camera) | 12 Megapixel | 2 Megapixel | Samsung Galaxy S21 FE 5G has better second camera resolution than OPPO A57s. |
|---|---|---|---|
| Sensor Size (2nd Camera) | - | 1/5" | |
| Lens Type (2nd Camera) | Ultra wide-angle lens | - | |
| Lens Aperture (2nd Camera) | F/2.2 | F/2.4 | Samsung Galaxy S21 FE 5G has better second camera lens aperture than Samsung Galaxy S21 FE 5G. |
| Lens Element Qty (2nd Camera) | - | 3-element | |
| Field of View (2nd Camera) | 123 degree(s) | 89 degree(s) | Samsung Galaxy S21 FE 5G has larger second camera lens field of view than OPPO A57s. |
| Pixel Size (2nd Camera) | 1.12 μm | 1.75 μm | OPPO A57s has larger second camera pixel size than Samsung Galaxy S21 FE 5G. |
| Minimum Focal Length (2nd Camera) | - | 21 mm | |
| Camera Functions (2nd Camera) | - | Monochrome |
| THIRD CAMERA |
|---|
| Sensor Resolution (3rd Camera) | 8 Megapixel | - | |
|---|---|---|---|
| Lens Type (3rd Camera) | Telephoto lens | - | |
| Lens Aperture (3rd Camera) | F/2.4 | - | |
| 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 | 1 | 1 | |
|---|---|---|---|
| Sensor Resolution (Front) | 32 Megapixel | 8 Megapixel | Samsung Galaxy S21 FE 5G has better front camera resolution than OPPO A57s. |
| Sensor Size (Front) | - | 1/1.4" | |
| Sensor Name (Front) | - | Omnivision OV08D10 sensor | |
| Lens Aperture (Front) | F/2.2 | F/2.0 | OPPO A57s has better front lens aperture than Samsung Galaxy S21 FE 5G. |
| Lens Element Qty (Front) | - | 5-element | |
| Field of View (Front) | 81 degree(s) | 79 degree(s) | Samsung Galaxy S21 FE 5G has larger front lens field of view than OPPO A57s. |
| Pixel Size (Front) | 0.8 μm | 1.12 μm | OPPO A57s has larger front camera pixel size than Samsung Galaxy S21 FE 5G. |
| Focus Adjustment | Focus free | Focus free | |
| Min Focal Length (Front) | - | 26 mm | |
| Special Effects (Front) | - | Stickers | |
| Camera Modes (Front) | - | Panorama, Time-lapse mode, Portrait | |
| Video Resolutions (Front) | - | 1920 x 1080 (1080p) at 30 fps, 1280 x 720 (720p) at 30 fps |
| BATTERY AND CHARGING | Samsung Galaxy S21 FE 5G | OPPO A57s |
|---|
| Battery Capacity (Battery Size) | 4500 mAh | 5000 mAh | OPPO A57s has larger battery capacity than Samsung Galaxy S21 FE 5G. |
|---|---|---|---|
| Fast Charging Technology | Samsung Fast Charging | SuperVOOC Flash Charge technology | Both phones have fast charging technology. |
| Wireless Charging | Yes | - | Samsung Galaxy S21 FE 5G can be charged wirelessly. |
| Wireless Charging Standards | Wireless PowerShare | - | |
| Standby Time | - | 304 hours | |
| Talk Time | 2220 minutes | 1800 minutes | Samsung Galaxy S21 FE 5G has longer battery life when making calls than OPPO A57s. |
| Run Time Details | 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 |
Talk: up to 1800 min Standby (4G): up to 304 hrs Playback (video): up to 13.4 hrs Playback (audio (via speakers, 50% volume)): up to 40 hrs |
| CELLULAR | Samsung Galaxy S21 FE 5G | OPPO A57s |
|---|
| Technology | WCDMA (UMTS) / GSM | WCDMA (UMTS) / GSM | |
|---|---|---|---|
| Mobile Broadband Generation | 5G | 4G | Samsung Galaxy S21 FE 5G has more advanced generation mobile network. |
| Operating System | Android 12 | ColorOS 12.1 (based on Android 12) | |
| Intelligent Assistant | Bixby | - | |
| Payment Technology | Samsung Pay | - | |
| Navigation | GPS, GLONASS, BeiDou, Galileo, QZSS | GPS, A-GPS, GLONASS, BeiDou, Galileo, QZSS |
| COMMUNICATIONS | Samsung Galaxy S21 FE 5G | OPPO A57s |
|---|
| Data Transmission | FDD-LTE, TDD-LTE, 5G NR FR1 | VoLTE, FDD-LTE, TDD-LTE, VoWiFi | |
|---|---|---|---|
| 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 8 | Band 1, Band 5, Band 8 | |
| 3G UMTS Frequency | 2100, 1900, 1700, 850, 900 | 2100, 850, 900 | |
| 4G LTE Band | 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 | Band 1, Band 3, Band 5, Band 7, Band 8, Band 20, Band 28, Band 38, Band 40, Band 41 | |
| 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 DD, FDD 850+, FDD 700 APT, FDD 1500 L, TDD 2600, TDD 2300, TDD 2500, FDD 1700 - 2110 AWS-3 | FDD 2100, FDD 1800+, FDD 850, FDD 2600, FDD 900, FDD 800 DD, FDD 700 APT, TDD 2600, TDD 2300, TDD 2500 | |
| 5G NR Band | 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, 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 5.0 | Bluetooth 5.3 BLE | |
| NFC | Yes | Yes | Both phones have an NFC reader for mobile payments. |
| MEDIA | Samsung Galaxy S21 FE 5G | OPPO A57s |
|---|
| Supported Digital Audio Standards | WAV, AAC, AMR, MP3, FLAC, XMF, OGG, MIDI, APE (Monkey's Audio), M4A, DSF, MXMF, OGA, 3GA, AWB, IMY, RTTTL, RTX, OTA, DFF, MID | WAV, WMA, AAC, AMR, MP3, FLAC, AC-3, OGG, MIDI, APE (Monkey's Audio), LDAC, OPUS, MID, SBC, apt-X HD | |
|---|---|---|---|
| Supported Digital Video Standards | MKV, FLV, AVI, 3GP, M4V, WebM, 3G2, MP4 | MKV, FLV, AVI, MOV, ASF, 3GP, M4V, TS, M2TS, WebM, MP4 | |
| Sound Enhancements | Dolby Digital Plus sound, Dolby Atmos sound technology, Surround sound, stereo speakers tuned by AKG, Dolby Digital sound | Dirac sound technologies |
| FEATURES | Samsung Galaxy S21 FE 5G | OPPO A57s |
|---|
| Sensors | Accelerometer, proximity sensor, barometer, gyro sensor, hall sensor, geomagnetic sensor, light sensor | Accelerometer, proximity sensor, magnetometer, gravity sensor, brightness sensor | |
|---|---|---|---|
| Security Devices | Fingerprint reader | Face recognition, fingerprint reader (side) | |
| Additional Phone Features | MIMO technology, Fast Charging, Samsung KNOX, Samsung DeX support, Samsung Smart Switch, Game mode | Noise reduction microphone, Fast Charging, 3 years of Security Updates, 2 years of OS upgrades, Cooling Graphite Thermal Pad, Reverse charging, super-linear dual speakers |
| OTHERS | Samsung Galaxy S21 FE 5G | OPPO A57s |
|---|
| Included Accessories | SIM card removal tool, USB-C cable | SIM card removal tool, USB-C charging cable, protective film, SuperVOOC 33W power adapter | |
|---|---|---|---|
| Compliant Standards | IP68 | IPX4 | |
| Max Depth of Water Resistance | 1.5 m | - |
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