Side-by-side technical data
vivo X21 vs vivo X20 Plus UD
Comparison between vivo X21 and vivo X20 Plus UD: camera, battery, fast charging, display, performance and colors, side by side. More phones from vivo.
The verdict
Your pick: vivo X21, ahead on Design & display and Performance & hardware. Unless Battery & charging decides it for you.
| Category | X21 | X20 Plus UD |
|---|---|---|
| Design & display | 7.5 | 7.0 |
| Performance & hardware | 4.0 | 3.7 |
| Camera | 3.6 | 3.5 |
| Connectivity | 4.2 | 4.0 |
| Battery & charging | 2.7 | 3.7 |
Which one is for you?
vivo X21, if you care about…
- RAM Capacity
- 6 GB
- against 4 GB
- Display Pixel Density
- 402 ppi
- against 376 ppi
- Weight
- 156.2 g
- against 181.5 g
- Display Vertical Resolution
- 2,280 px
- against 2,160 px
vivo X20 Plus UD, if you care about…
- Battery Capacity
- 3,900 mAh
- against 3,200 mAh
- RAM Type
- DDR4
- against LPDDR4
- Fast Charge Power
- 22.5 W
- against 18 W
Specification comparison
Performance
| Specification | X21 | X20 Plus UD |
|---|---|---|
| Processor Model | Qualcomm Snapdragon 660 | Qualcomm Snapdragon 660 |
| Processor Process Size | 14 nm | 14 nm |
| Graphics GPU | Qualcomm Adreno 512 | Qualcomm Adreno 512 |
| Storage Type | eMMC 5.1 | eMMC 5.1 |
| Maximum CPU Clock | 2.2 GHz | 2.2 GHz |
| Maximum Storage Capacity | 128 GB | 128 GB |
| Geekbench 6 Single-Core | 342 | 342 |
| Geekbench 6 Multi-Core | 1,232 | 1,232 |
| CPU Description | Octa-core CPU with 4 × 2.2 GHz Kryo 260 Gold cores and 4 × 1.8 GHz Kryo 260 Silver cores. | Octa-core (4x2.2 GHz Kryo 260 Gold & 4x1.8 GHz Kryo 260 Silver) |
| Processor Type | Octa-Core | Octa-Core |
| 64-Bit Processor | Yes | Yes |
| RAM Capacity | 6 GB Best value | 4 GB |
| RAM Type | LPDDR4 | DDR4 Best value |
| Expandable Storage | Yes | Yes |
| Maximum memory card | 256 GB | 256 GB |
Design
| Specification | X21 | X20 Plus UD |
|---|---|---|
| Body Colors | Black, White, Red | Black, Gold, Rose Gold |
| Body Thickness | 7.4 mm Best value | 7.5 mm |
| Body Width | 74.8 mm | 80.1 mm |
| Body Height | 154.5 mm | 155.3 mm |
| Weight | 156.2 g Best value | 181.5 g |
| Usable Surface | 85.2 % | 85.8 % Best value |
| Body Materials | Glass, Aluminium Alloy | Glass, Aluminium Alloy |
| Unfolded thickness | 7.4 mm | — |
Battery
| Specification | X21 | X20 Plus UD |
|---|---|---|
| Battery Capacity | 3,200 mAh | 3,900 mAh Best value |
| Battery Type | Li-Ion | Li-Ion |
| Fast Charge Power | 18 W | 22.5 W Best value |
| Battery Features | Fast Charging, Battery Level Indicator, Rechargeable | Fast Charging, Battery Level Indicator, Rechargeable |
Display
| Specification | X21 | X20 Plus UD |
|---|---|---|
| Display Aspect Ratio | 19:9 | 18:9 |
| Display Technology | Super AMOLED | Super AMOLED |
| Display Diagonal | 6.28″ | 6.43″ Best value |
| Display Horizontal Resolution | 1,080 px | 1,080 px |
| Display Vertical Resolution | 2,280 px Best value | 2,160 px |
| Display Pixel Density | 402 ppi Best value | 376 ppi |
| Display Features | Gorilla Glass 3, Capacitive Touch, Touchscreen | Touchscreen |
Sensors
| Specification | X21 | X20 Plus UD |
|---|---|---|
| Fingerprint Sensor Placement | Rear | Under Display |
Sensor
| Specification | X21 | X20 Plus UD |
|---|---|---|
| Sensor Features | Fingerprint Sensor, Accelerometer, Proximity Sensor, Compass, Gyroscope | Fingerprint Sensor, Accelerometer, Proximity Sensor, Compass, Gyroscope |
Software
| Specification | X21 | X20 Plus UD |
|---|---|---|
| Operating System | Android 8 | Android 7 |
| OS Family | Android | Android |
| OS Version | 8 Best value | 7 |
Connectivity
| Specification | X21 | X20 Plus UD |
|---|---|---|
| SIM Configurations | Dual Nano-SIM | Dual Nano-SIM |
| Cellular Bands | 2G GSM 850, 2G GSM 900, 2G GSM 1800, 2G GSM 1900, 3G UMTS B850, 3G UMTS B900, 3G UMTS 1900, 3G UMTS 2100, 4G LTE B1, 4G LTE B2, 4G LTE B3, 4G LTE B5, 4G LTE B8, 4G LTE B34, 4G LTE B38, 4G LTE B39, 4G LTE B40, 4G LTE B41 | 2G GSM 900, 2G GSM 1800, 3G UMTS B850, 3G UMTS B900, 3G UMTS 1900, 3G UMTS 2100, 4G LTE B1, 4G LTE B2, 4G LTE B3, 4G LTE B4, 4G LTE B5, 4G LTE B8, 4G LTE B38, 4G LTE B39, 4G LTE B40, 4G LTE B41 |
| Cellular Technologies | GSM, CDMA, HSPA, UMTS, LTE, 4G | GSM, CDMA, HSPA, UMTS, LTE, 4G |
| Wi-Fi Standards | Wi-Fi 802.11a/b/g/n/ac, 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 Direct | Dual Band, Wi-Fi Direct |
| Bluetooth Version | Bluetooth 5.0 | Bluetooth 5.0 |
| Bluetooth Profiles | A2DP, LE | A2DP, LE |
| Navigation Systems | GPS, GLONASS Best value | GPS |
| Connectivity Features | 3.5 mm Audio Jack, FM Radio, USB OTG, microUSB | 3.5 mm Audio Jack, microUSB, USB OTG |
| USB Version | USB 2.0 | USB 2.0 |
| SAR American Head | 0.57 W/kg | — |
| SAR American Body | 1.18 W/kg | — |
| Max. download speed | 300 Mbps | 300 Mbps |
| Max. upload speed | 50 Mbps | 50 Mbps |
Audio
| Specification | X21 | X20 Plus UD |
|---|---|---|
| Microphone Count | 2 | 2 |
| Audio Features | A2DP, LE, Loudspeaker, 32-bit/192 kHz Audio | Loudspeaker, 32-bit/192 kHz Audio, Hi-Res Audio |
Technical
| Specification | X21 | X20 Plus UD |
|---|---|---|
| Model numbers | 1725, X21A | — |
