Samsung Galaxy S21 FE (SM-G990U 128GB) vs Samsung Galaxy A51 5G (SM-A516N)
Side by side comparison between Samsung Galaxy S21 FE vs Samsung Galaxy A51 5G phones, differences, pros, cons and full specifications. What's the better?
,
6.4"
AMOLED
AMOLED
1080x2400
12.2
MP
MP
32mp
6GB
RAM
RAM
Octa-core
4500
mAh
mAh
(Non removable)
vs
6.5"
AMOLED
AMOLED
1080x2400
48
MP
MP
32mp
6GB
RAM
RAM
Octa-core
4500
mAh
mAh
(Non removable)
What's the better phone? Samsung Galaxy S21 FE (SM-G990U 128GB)
The phonemore's choice is much more technical than personal. Therefore, you shouldn't only consider this. Our goal is to help you, but what's important to us may not be important to you. You decide which one is the best! Comment!
22 Advantages 
6 Advantages | 28 Common items in both devices |
| 128GB (97GB available) / 128GB (105GB available) |
| Aluminum body, glass front, plastic back |
| Dynamic AMOLED / Super AMOLED |
| 16 million |
| 1080x2400 pixels |
| LED flash |
| PDAF: phase detection autofocus |
| +21 specs and more in the table below |
Check the comparison table below for more items that are not evaluated in comparison score above.
Highlight differences Clear highlight📱 Model features | ||
| Galaxy S21 FE (SM-G990U 128GB) | Galaxy A51 5G (SM-A516N) | |
| Model | Galaxy S21 FE (SM-G990U 128GB) | Galaxy A51 5G (SM-A516N) |
| Other model names | Galaxy S21 FE 5G SM-G990U1 (Snapdragon) | 갤럭시 A51 5G SM-A516NZWMKOO |
| Country or region available |  USA |  South Korea |
| Brand | Samsung | Samsung |
| Release date | 1/7/2022, Announced: 1/4/2022 | 4/29/2020, Announced: 4/8/2020 |
| Depth | 7.9 millimeters (0.31 inches) | 8.7 millimeters (0.34 inches) |
| Size (width x height) | 74.5 x 155.7 millimeters (2.93 x 6.13 in) | 73.6 x 158.9 millimeters (2.9 x 6.26 in) |
| Weight | 177 grams (6.2 ounces) | 187 grams (6.55 ounces) |
| Build, materials | Aluminum body, glass front, plastic back | Aluminum body, glass front, plastic back |
| Protection against water and others | IP68 certified: water-resistant up to 1.5 meters for 30min and dust-resistant | Not supported |
📲 Display | ||
| Galaxy S21 FE (SM-G990U 128GB) | Galaxy A51 5G (SM-A516N) | |
| Display type | Dynamic AMOLED | Super AMOLED |
| Screen size | 6.4" inches | 6.5" inches |
| Screen-to-body ratio | ~85.3% (screen-to-body ratio) | ~87.2% (screen-to-body ratio) |
| Display resolution | 1080x2400 pixels (20:9) | 1080x2400 pixels (20:9) |
| Touchscreen | Capacitive Multitouch 10-points | Capacitive Multitouch |
| Pixel density (dot pitch) | 411 PPI | 405 PPI |
| Colors | 16 million | 16 million |
| Scratch-resistant glass | Gorilla Glass Victus | Gorilla Glass 3 |
| Refresh rate | 120Hz | 60Hz |
| Display features | 1300nits[peak] HDR10+ Always-On Display | Always-On Display |
🤖 Operating System | ||
| Galaxy S21 FE (SM-G990U 128GB) | Galaxy A51 5G (SM-A516N) | |
| System version | Android 12 | Android 10 |
| Firmware update | Android 14 | Android 13 |
| User Interface | One UI 4.1 / 5.1 / 6.0 | One UI 2.5 / 3.1 / 4.1 / 5.0 |
⚙️ Processor | ||
| Galaxy S21 FE (SM-G990U 128GB) | Galaxy A51 5G (SM-A516N) | |
| Chipset | 64bit: Qualcomm Snapdragon 888 (SM8350) (5nm) | 64bit: Samsung Exynos 980 (8nm) |
| CPU | Octa-core, 3 processors: 1x 2.84GHz Kryo 680 (Single-core) 3x 2.42GHz Kryo 680 (Triple-core) 4x 1.8GHz Kryo 680 (Quad-core) | Octa-core, 2 processors: 2x 2.2GHz ARM Cortex-A77 (Dual-core) 6x 1.8GHz ARM Cortex-A55 (Hexa-core) |
| GPU graphical controller | Qualcomm Adreno 660 (840MHz) | ARM Mali-G76 MP5 (728MHz) |
| Performance (benchmark) | AnTuTu: 566529 (v8), 719696 (v9) Geekbench: 3049 (v5.1) GFXBench: 56fps (ES 3.1 onscreen) | AnTuTu: 316007 (v8) Geekbench: 1867(v5.1) GFXBench: 17fps (ES 3.1 onscreen) |
💽 Memory and storage | ||
| Galaxy S21 FE (SM-G990U 128GB) | Galaxy A51 5G (SM-A516N) | |
| RAM memory | 6GB LPDDR5 | 6GB LPDDR4X |
| Internal storage | 128GB (97GB available) UFS 3.1 | 128GB (105GB available) UFS 2.1 |
| External storage | Not supported | Until 1TB microSD, microSDXC (dedicated slot) |
📶 Mobile networks | ||
| Galaxy S21 FE (SM-G990U 128GB) | Galaxy A51 5G (SM-A516N) | |
| Dual-SIM | Dual-SIM Standby - Call active on one sim card | Not supported |
| SIM card | 2 slots (Dual-SIM) nano-SIM (4FF) | 1 slot (Single-SIM) nano-SIM (4FF) |
| Maximum Download / Upload | 2000/1024 Mbps | 2000/200 Mbps |
| Network technology | 2G, 3G, 4G, 5G | 2G, 3G, 4G, 5G |
| Frequency, bands | Expand band details Collapse details | |
| GSM MHz band | Quad-Band 850/900/1800/1900 | Quad-Band 850/900/1800/1900 |
| Primary 2G network | GSM 850/900/1800/1900 | GSM 850/900/1800/1900 |
| Primary 3G network | UMTS 850/900/1700/1900/2100 | UMTS 850/900/1700/1900/2100 |
| Primary 4G network | LTE Cat20 (1, 3, 3, 4, 5, 7, 8, 12, 20, 28) TD-LTE (34, 38, 39, 40, 41) VoLTE | LTE Cat12/13 (1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 20, 26, 28, 66) TD-LTE (38, 40, 41) VoLTE |
| Primary 5G network | SA/NSA/Sub6 (1, 3, 5, 8, 28, 41, 78, 79) | SA/NSA/Sub6 (78) |
| Primary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA |
| Secondary 2G network | GSM 850/900/1800/1900 | Not supported |
| Secondary 3G network | UMTS 850/900/1700/1900/2100 | Not supported |
| Secondary 4G network | LTE Cat20 (1, 3, 3, 4, 5, 7, 8, 12, 20, 28) TD-LTE (34, 38, 39, 40, 41) VoLTE | Not supported |
| Secondary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA | Not supported |
📷 Camera | ||
| Galaxy S21 FE (SM-G990U 128GB) | Galaxy A51 5G (SM-A516N) | |
| Back camera (main camera) | (triple camera) 12.2 megapixels 12MP ultrawide f/2.2123°13mm1/3"1.12µm 8MP telephoto f/2.476mm1/4.5"1.0µmPDAFOIS3x-optical-zoom | (quad camera) 48 megapixels 12MP ultrawide f/2.213mm1.12µm 5MP telephoto f/2.440mm 5MP depth f/2.21/5.0"1.12µm |
| Main camera resolution | 4032x3024 pixels | 8000x6000 pixels |
| Video recording (primary) | 4K UHD (3840x2160) 60 fps | 4K UHD (3840x2160) 30 fps |
| Flash | LED flash | LED flash |
| Focal aperture | f/1.8 (aperture) | f/2.0 (aperture) |
| Focal length | 26mm lens | 26mm lens |
| Sensor size | 1/1.76" inches | 1/2" inches |
| Pixel size | 1.8µm pixel | 0.8µm pixel |
| Autofocus | PDAF: phase detection autofocus | PDAF: phase detection autofocus |
| Touch focus | Supported | Supported |
| Image stabilization | OIS: Optical stabilization | EIS: Digital stabilization |
| Zoom | Digital and optical zoom | Only digital zoom |
| Face/smile detection | Face detection, Smile detection | Face detection, Smile detection |
| BSI sensor | Supported | Not supported |
| HDR | HDR photo/video on both cameras | HDR photo on both cameras |
| Camera extras | 4K@30/60fps 1080p@30/60fps 1080p@240fps (slow motion) 720p@960fps (slow motion) | feature not registered |
📸 Front camera | ||
| Galaxy S21 FE (SM-G990U 128GB) | Galaxy A51 5G (SM-A516N) | |
| Front camera (secondary) | 32 megapixels | 32 megapixels |
| Front camera resolution | 6528x4896 pixels | 6528x4896 pixels |
| Video recording (secondary) | 4K UHD (3840x2160) | 4K UHD (3840x2160) |
| Front flash | Not supported | Not supported |
| Focal aperture | f/2.2 (aperture) | f/2.2 (aperture) |
| Focal length | 26mm lens | 26mm lens |
| Sensor size | 1/2.74" inches | 1/2.8" inches |
| Pixel size | 0.8µm pixel | 0.8µm pixel |
🔉 Sound and multimedia | ||
| Galaxy S21 FE (SM-G990U 128GB) | Galaxy A51 5G (SM-A516N) | |
| Loudspeaker | Stereo sound 32-bit/384kHz Dolby Atmos Tuned by AKG | Supported |
| Active noise cancellation | 2 microphones or more | 2 microphones or more |
| Radio | Not supported | FM (RDS) |
| TV | Not supported | Not supported |
| Video formats | MP4, H.265, H.264, H.263, XviD, MKV | MP4, H.265, H.264, H.263, XviD, MKV |
| Audio formats | MP3, WAV, WMA, eAAC+, FLAC | MP3, WAV, WMA, eAAC+, FLAC |
🔌 Connectivity | ||
| Galaxy S21 FE (SM-G990U 128GB) | Galaxy A51 5G (SM-A516N) | |
| USB | USB 3.2 Type-C, USB OTG On-The-Go | USB 2.0 Type-C, USB OTG On-The-Go |
| Audio output | Type-C reversible connector | 3.5mm jack |
| TV output | USB Type-C SlimPort® | Not supported |
| Bluetooth | 5.0 + A2DP/LE | 5.0 + A2DP/LE |
| WiFi | 802.11 a/b/g/n/ac/ax [wifi6] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot | 802.11 a/b/g/n/ac [wifi5] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot |
| DLNA | Supported | Not supported |
| GPS | A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou | A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou |
| NFC | Supported | Supported |
| Infrared port | Not supported | Not supported |
🧭 Sensors | ||
| Galaxy S21 FE (SM-G990U 128GB) | Galaxy A51 5G (SM-A516N) | |
| Sensors | Accelerometer Ambient light sensor Barometer Compass Face unlock Fingerprint sensor (under display) Gyroscope Hall effect Proximity sensor | Accelerometer Ambient light sensor ANT+ Compass Face unlock Fingerprint sensor (under display) Gyroscope Hall effect Virtual proximity sensor |
| Vibrating alert | Supported | Supported |
🔋 Battery | ||
| Galaxy S21 FE (SM-G990U 128GB) | Galaxy A51 5G (SM-A516N) | |
| Battery type | LiPo: li-ion polymer (Non removable) | LiPo: li-ion polymer (Non removable) |
| Battery capacity | 4500 mAh | 4500 mAh |
| Charger, watts | 25W Wired fast charging Reverse charging by cable USB Power Delivery 3.0 | 15W Wired fast charging |
| Inductive / wireless charging | 15W Qi wireless charging 4.5W Reverse wireless charging | Not supported |
| Talk time autonomy | feature not registered | feature not registered |
| Standby | feature not registered | feature not registered |
➕ Other features | ||
| Galaxy S21 FE (SM-G990U 128GB) | Galaxy A51 5G (SM-A516N) | |
| Call control | Voice dialing, Voice recorder, Voice commands | Voice dialing, Voice recorder |
| Messaging | SMS (T9), MMS, E-mail, Push mail | SMS (T9), MMS, E-mail, Push mail |
| Hands-free calling | Supported | Supported |
| Video calling | Supported | Supported |
| Ringtones | Polyphonic and customized | Polyphonic and customized |
| Web browser | HTML, XHTML, HTML5 | HTML, XHTML, HTML5 |
| Antenna | Internal antenna | Internal antenna |
| Qwerty physical keyboard | Not supported | Not supported |
| Miscellaneous | • Colors: Graphite, White, Lavender, Olive | • Colors: Prism Cube Black, Prism Cube White, Prism Cube Pink |
☢️ Radiation rate | ||
| Galaxy S21 FE (SM-G990U 128GB) | Galaxy A51 5G (SM-A516N) | |
| SAR 1.6W/kg (USA, Mexico, etc.) | 0.77W/kg (head), 0.9W/kg (body) | 0.497W/kg (head), 1.22W/kg (body) |
| SAR 2W/kg (Europe, UK, etc.) | feature not registered | feature not registered |