Side-by-side technical data
Realme C21 vs LG K51S
Comparison between Realme C21 and LG K51S: camera, battery, fast charging, display, performance and colors, side by side. More phones from Realme and LG.
The verdict
Your pick: LG K51S, ahead on Design & display and Camera. Unless Battery & charging decides it for you.
| Category | C21 | K51S |
|---|---|---|
| Design & display | 4.6 | 5.1 |
| Performance & hardware | 2.5 | 2.7 |
| Camera | 3.0 | 4.0 |
| Connectivity | 4.9 | 4.7 |
| Battery & charging | 5.8 | 3.8 |
Which one is for you?
Realme C21, if you care about…
- Battery Capacity
- 5,000 mAh
- against 4,000 mAh
- AnTuTu Score
- 110,490
- against 103,115
- RAM Capacity
- 4 GB
- against 3 GB
- Wi-Fi Standards
- Wi-Fi 802.11 b/g/n, Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac)
- against Wi-Fi 802.11 b/g/n, Wi-Fi 4 (802.11n)
LG K51S, if you care about…
- Display Pixel Density
- 282 ppi
- against 270 ppi
- Usable Surface
- 84 %
- against 80.8 %
- Body Thickness
- 8.3 mm
- against 8.9 mm
- Max. download speed
- 300 Mbps
- against 42.2 Mbps
Specification comparison
Performance
| Specification | C21 | K51S |
|---|---|---|
| Processor Model | MediaTek Helio G35 | MediaTek Helio P35 |
| Processor Process Size | 12 nm | 12 nm |
| Graphics GPU | PowerVR GE8320 | PowerVR GE8320 |
| Storage Type | eMMC 5.1 | eMMC 5.1 |
| Maximum CPU Clock | 2.3 GHz | 2.3 GHz |
| Maximum Storage Capacity | 64 GB | 64 GB |
| AnTuTu Score | 110,490 Best value | 103,115 |
| Geekbench 6 Single-Core | 189 Best value | 164 |
| Geekbench 6 Multi-Core | 810 Best value | 744 |
| CPU Description | Octa-core processor with four Cortex-A53 cores at 2.3 GHz and four Cortex-A53 cores at 1.8 GHz. | Octa-core processor with four 2.3 GHz Cortex-A53 cores and four 1.8 GHz Cortex-A53 cores. |
| Processor Type | Octa-Core | Octa-Core |
| 64-Bit Processor | Yes | Yes |
| RAM Capacity | 4 GB Best value | 3 GB |
| RAM Type | LPDDR4X | DDR4 |
| Expandable Storage | Yes | Yes |
| AnTuTu version | v8 | v8 |
Design
| Specification | C21 | K51S |
|---|---|---|
| Body Colors | Black, Blue | Titanium, Pink, Blue, Red, Grey |
| Body Thickness | 8.9 mm | 8.3 mm Best value |
| Body Width | 76.4 mm | 76.7 mm |
| Body Height | 165.2 mm | 165.2 mm |
| Weight | 190 g Best value | 194.5 g |
| Usable Surface | 80.8 % | 84 % Best value |
| Body Materials | Glass, Plastic | Polycarbonate |
| Resistance Features | — | MIL-STD-810G |
Battery
| Specification | C21 | K51S |
|---|---|---|
| Battery Capacity | 5,000 mAh Best value | 4,000 mAh |
| Battery Type | Lithium | Li-Polymer |
| Fast Charge Power | 10 W | — |
| Battery Features | Fast Charging, Reverse Charging, Non-Removable, Rechargeable, Battery Level Indicator | Non-Removable, Rechargeable, Battery Level Indicator |
Display
| Specification | C21 | K51S |
|---|---|---|
| Display Aspect Ratio | 20:9 | 20:9 |
| Display Technology | IPS LCD | IPS LCD |
| Peak Display Brightness | 400 nits | — |
| Display Diagonal | 6.5″ | 6.55″ Best value |
| Display Horizontal Resolution | 720 px | 720 px |
| Display Vertical Resolution | 1,600 px | 1,600 px |
| Display Pixel Density | 270 ppi | 282 ppi Best value |
| Display Refresh Rate | 60 Hz | — |
| Touch Sampling Rate | 120 Hz | — |
| Display Contrast Ratio | 1,500 :1 | — |
| Display Features | IPS LCD, Water Drop Notch, TÜV Rheinland Eye Comfort Certification, Scratch Resistant, Curved Glass, Capacitive Touch, Multi-Touch, Frameless, Touchscreen | IPS LCD, Scratch Resistant, Hole-Punch Notch, Capacitive Touch, Multi-Touch, Frameless, Touchscreen |
Sensors
| Specification | C21 | K51S |
|---|---|---|
| Fingerprint Sensor Placement | Rear | Rear |
Sensor
| Specification | C21 | K51S |
|---|---|---|
| Sensor Features | Fingerprint Sensor, Accelerometer, Proximity Sensor, Compass, Gravity Sensor, Light Sensor | Fingerprint Sensor, Accelerometer, Proximity Sensor, Compass, Light Sensor |
Software
| Specification | C21 | K51S |
|---|---|---|
| Operating System | Android 10 | Android 9 |
| OS Family | Android | Android |
| OS Version | 10 Best value | 9 |
| Google Services | Yes | Yes |
Connectivity
| Specification | C21 | K51S |
|---|---|---|
| SIM Configurations | Dual Nano-SIM, Dual SIM Dual Standby, Dual SIM | 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 B5, 3G UMTS B8, 3G UMTS B850, 3G UMTS B900, 3G UMTS 2100, 4G LTE B1, 4G LTE B3, 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 B5, 3G UMTS B8, 4G LTE B1, 4G LTE B3, 4G LTE B7, 4G LTE B8, 4G LTE B20, 4G LTE B28A, 4G LTE B28B, 4G LTE B38 |
| Cellular Technologies | GSM, HSPA, UMTS, LTE, 4G | GSM, HSPA, UMTS, LTE, 4G |
| Wi-Fi Standards | Wi-Fi 802.11 b/g/n, Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac) Best value | Wi-Fi 802.11 b/g/n, Wi-Fi 4 (802.11n) |
| Wi-Fi Features | Dual Band, Wi-Fi Hotspot, Wi-Fi Direct, Wi-Fi 802.11 b/g/n | Dual Band, Wi-Fi Hotspot, Wi-Fi Direct, Wi-Fi Display, DLNA |
| Bluetooth Version | Bluetooth 5.0 | Bluetooth 5.0 |
| Bluetooth Profiles | A2DP, LE, EDR | A2DP, LE |
| Navigation Systems | GPS, A-GPS, GLONASS, BeiDou, Galileo Best value | GPS, A-GPS, GLONASS, BeiDou |
| Connectivity Features | 3.5 mm Audio Jack, FM Radio, Computer Sync, OTA Sync, Tethering, VoLTE, USB Charging, USB Mass Storage, USB OTG | 3.5 mm Audio Jack, NFC, USB Charging, USB Mass Storage, USB OTG, USB Type-C, Computer Sync, OTA Sync, Tethering, DLNA |
| USB Version | USB 2.0 | USB 2.0 |
| SAR American Head | — | 0.68 W/kg |
| SAR American Body | — | 0.92 W/kg |
| SAR (EU) head | 0.74 W/kg | 0.501 W/kg Best value |
| SAR (EU) body | 1.151 W/kg Best value | 1.335 W/kg |
| Max. download speed | 42.2 Mbps | 300 Mbps Best value |
| Max. upload speed | 5.76 Mbps | 50 Mbps Best value |
Audio
| Specification | C21 | K51S |
|---|---|---|
| Microphone Count | 1 | 1 |
| Audio Features | A2DP, LE, EDR, Loudspeaker | A2DP, LE, Loudspeaker |
Technical
| Specification | C21 | K51S |
|---|---|---|
| Model numbers | RMX3201 | LMK510EMW, LM-K510EMW, LM-K510 |
