Side-by-side technical data
Samsung Galaxy A21s vs Samsung Galaxy A51
Comparison between Samsung Galaxy A21s and Samsung Galaxy A51: camera, battery, fast charging, display, performance and colors, side by side. More phones from Samsung.
The verdict
Neither runs away with it: each wins something.
| Category | Galaxy A21s | Galaxy A51 |
|---|---|---|
| Design & display | 4.8 | 6.6 |
| Performance & hardware | 2.6 | 3.7 |
| Camera | 4.9 | 4.4 |
| Connectivity | 5.6 | 5.8 |
| Battery & charging | 5.3 | 3.7 |
Which one is for you?
Samsung Galaxy A21s, if you care about…
- Battery Capacity
- 5,000 mAh
- against 4,000 mAh
- Peak Display Brightness
- 490 nits
- against 400 nits
Samsung Galaxy A51, if you care about…
- AnTuTu Score
- 276,561
- against 107,157
- RAM Capacity
- 8 GB
- against 6 GB
- Storage Type
- UFS 2.0
- against eMMC 5.1
- Display Technology
- Super AMOLED
- against PLS LCD
Specification comparison
Performance
| Specification | Galaxy A21s | Galaxy A51 |
|---|---|---|
| Processor Model | Samsung Exynos 850 | Samsung Exynos 9611 |
| Processor Process Size | 8 nm Best value | 10 nm |
| Graphics GPU | Mali-G52 MP1 | Mali-G72 MP3 |
| Storage Type | eMMC 5.1 | UFS 2.0 Best value |
| Maximum CPU Clock | 2 GHz | 2.3 GHz Best value |
| Maximum Storage Capacity | 128 GB | 256 GB Best value |
| AnTuTu Score | 107,157 | 276,561 Best value |
| Geekbench 6 Single-Core | 222 | 331 Best value |
| Geekbench 6 Multi-Core | 868 | 1,052 Best value |
| CPU Description | Octa-core CPU with 4 Cortex-A55 cores at 2.0 GHz and 4 Cortex-A55 cores at 2.0 GHz | Octa-core CPU with 4 Cortex-A73 cores at 2.3 GHz and 4 Cortex-A53 cores at 1.7 GHz. |
| Processor Type | Octa-Core | Octa-Core |
| 64-Bit Processor | Yes | Yes |
| RAM Capacity | 6 GB | 8 GB Best value |
| RAM Type | LPDDR4X | LPDDR4X |
| Expandable Storage | Yes | Yes |
| AnTuTu version | v8 | v10 |
Design
| Specification | Galaxy A21s | Galaxy A51 |
|---|---|---|
| Body Colors | Black, White, Blue, Red | Black, White, Blue, Pink |
| Body Thickness | 8.9 mm | 7.9 mm Best value |
| Body Width | 75.3 mm | 73.6 mm |
| Body Height | 163.7 mm | 158.5 mm |
| Weight | 192 g | 172 g Best value |
| Usable Surface | 82.8 % | 87.4 % Best value |
| Body Materials | Glass, Plastic | Glass, Plastic |
Battery
| Specification | Galaxy A21s | Galaxy A51 |
|---|---|---|
| Battery Capacity | 5,000 mAh Best value | 4,000 mAh |
| Battery Type | Li-Polymer | Li-Polymer |
| Fast Charge Power | 15 W | 15 W |
| Battery Features | Non-Removable, Rechargeable, Battery Level Indicator, Fast Charging | Non-Removable, Fast Charging, Rechargeable, Battery Level Indicator |
Display
| Specification | Galaxy A21s | Galaxy A51 |
|---|---|---|
| Display Aspect Ratio | 20:9 | 19.5:9 |
| Display Technology | PLS LCD | Super AMOLED Best value |
| Peak Display Brightness | 490 nits Best value | 400 nits |
| Display Diagonal | 6.5″ | 6.5″ |
| Display Horizontal Resolution | 720 px | 1,080 px Best value |
| Display Vertical Resolution | 1,600 px | 2,400 px Best value |
| Display Pixel Density | 270 ppi | 405 ppi Best value |
| Display Refresh Rate | 60 Hz | 60 Hz |
| Display Contrast Ratio | — | 20 :1 |
| Display Features | Hole-Punch Notch, Scratch Resistant, Capacitive Touch, Multi-Touch, Touchscreen | Gorilla Glass 3, AMOLED, Hole-Punch Notch, Scratch Resistant, Capacitive Touch, Multi-Touch, Frameless, Always-On Display |
Sensors
| Specification | Galaxy A21s | Galaxy A51 |
|---|---|---|
| Fingerprint Sensor Placement | Rear | Under Display |
Sensor
| Specification | Galaxy A21s | Galaxy A51 |
|---|---|---|
| Sensor Features | Fingerprint Sensor, Accelerometer, Gyroscope, Proximity Sensor, Compass, Light Sensor, Hall Sensor, 3D face recognition | Fingerprint Sensor, Accelerometer, Gyroscope, Compass, Light Sensor, Proximity Sensor |
Software
| Specification | Galaxy A21s | Galaxy A51 |
|---|---|---|
| Operating System | Android 10 | Android 13 |
| OS Family | Android | Android |
| OS Version | 10 | 13 Best value |
| OS Update Support | 2 years | 2 years |
| Google Services | Yes | Yes |
| Widevine L1 | Yes | Yes |
Connectivity
| Specification | Galaxy A21s | Galaxy A51 |
|---|---|---|
| SIM Configurations | Single Nano-SIM, Dual Nano-SIM, Dual SIM Dual Standby | Dual Nano-SIM, Dual SIM Dual Standby |
| Cellular Bands | 2G GSM 850, 2G GSM 900, 2G GSM 1800, 2G GSM 1900, 3G UMTS B1, 3G UMTS B2, 3G UMTS B5, 3G UMTS B8, 3G UMTS B21, 4G LTE B1, 4G LTE B2, 4G LTE B3, 4G LTE B4, 4G LTE B5, 4G LTE B7, 4G LTE B8, 4G LTE B20, 4G LTE B28A, 4G LTE B28B, 4G LTE B38, 4G LTE B40, 4G LTE B41 | 2G GSM 850, 2G GSM 900, 2G GSM 1800, 2G GSM 1900, 3G UMTS B1, 3G UMTS B2, 3G UMTS B3, 3G UMTS B4, 3G UMTS B5, 3G UMTS B8, 4G LTE B1, 4G LTE B2, 4G LTE B3, 4G LTE B4, 4G LTE B5, 4G LTE B7, 4G LTE B8, 4G LTE B12, 4G LTE B13, 4G LTE B17, 4G LTE B20, 4G LTE B26, 4G LTE B28A, 4G LTE B28B, 4G LTE B38, 4G LTE B40, 4G LTE B41, 4G LTE B66 |
| Cellular Technologies | GSM, HSPA, UMTS, LTE, 4G | GSM, HSPA, UMTS, LTE, 4G |
| Wi-Fi Standards | Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac), Wi-Fi 802.11a/b/g/n/ac | Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac) |
| Wi-Fi Features | Dual Band, Wi-Fi Hotspot, Wi-Fi Direct, Wi-Fi Display | Dual Band, Wi-Fi Hotspot, Wi-Fi Direct, Wi-Fi Display |
| Bluetooth Version | Bluetooth 5.0 | Bluetooth 5.0 |
| Bluetooth Profiles | A2DP, LE | A2DP, LE, AVRCP, DIP, HFP, HID, HSP, MAP, PAN, OPP, PBAP/PAB, HOGP, ANT+ |
| Navigation Systems | GPS, A-GPS, GLONASS, Galileo, BeiDou | GPS, A-GPS, GLONASS, BeiDou, Galileo |
| Connectivity Features | 3.5 mm Audio Jack, NFC, FM Radio, USB Charging, USB Mass Storage, USB OTG, USB Type-C, Computer Sync, OTA Sync, Tethering, VoLTE | 3.5 mm Audio Jack, Virtual Proximity Sensing, NFC, FM Radio, USB Charging, USB Mass Storage, USB OTG, USB Type-C, Computer Sync, OTA Sync, Tethering, VoLTE, ANT+ |
| USB Version | USB 2.0 | USB 2.0 |
| SAR American Head | — | 0.8 W/kg |
| SAR American Body | — | 0.67 W/kg |
| SAR (EU) head | 0.42 W/kg | 0.37 W/kg Best value |
| SAR (EU) body | 1.54 W/kg Best value | 1.59 W/kg |
| Max. download speed | 300 Mbps | 600 Mbps Best value |
| Max. upload speed | 150 Mbps | 150 Mbps |
Audio
| Specification | Galaxy A21s | Galaxy A51 |
|---|---|---|
| Microphone Count | 2 | 2 |
| Audio Features | A2DP, LE, Loudspeaker | Loudspeaker |
Technical
| Specification | Galaxy A21s | Galaxy A51 |
|---|---|---|
| Model numbers | SM-A217F, SM-A217F/DS, SM-A217F/DSN, SM-A217M, SM-A217M/DS, SM-A217N | SM-A515F, SM-A515F/DSN, SM-A515F/DS, SM-A515F/DST, SM-A515F/DSM, SM-A515F/N, SM-A515U, SM-A515U1, SM-A515W, SM-A515X, SM-S515DL |
