Side-by-side technical data
vivo X21 UD vs vivo X21
Comparison between vivo X21 UD and vivo X21: camera, battery, fast charging, display, performance and colors, side by side. More phones from vivo.
The verdict
Neither runs away with it: each wins something.
| Category | X21 UD | X21 |
|---|---|---|
| Design & display | 7.5 | 7.5 |
| Performance & hardware | 4.1 | 3.9 |
| Camera | 3.6 | 3.6 |
| Connectivity | 4.2 | 4.2 |
| Battery & charging | 2.7 | 2.7 |
Which one is for you?
vivo X21 UD, if you care about…
- RAM Type
- DDR4
- against LPDDR4
Specification comparison
Performance
| Specification | X21 UD | X21 |
|---|---|---|
| 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: 4 × 2.2 GHz Kryo 260 Gold and 4 × 1.8 GHz Kryo 260 Silver | Octa-core CPU with 4 × 2.2 GHz Kryo 260 Gold cores and 4 × 1.8 GHz Kryo 260 Silver cores. |
| Processor Type | Octa-Core | Octa-Core |
| 64-Bit Processor | Yes | Yes |
| RAM Capacity | 6 GB | 6 GB |
| RAM Type | DDR4 Best value | LPDDR4 |
| Expandable Storage | Yes | Yes |
| Maximum memory card | 256 GB | 256 GB |
Design
| Specification | X21 UD | X21 |
|---|---|---|
| Body Colors | Black, Red | Black, White, Red |
| Body Thickness | 7.4 mm | 7.4 mm |
| Body Width | 74.8 mm | 74.8 mm |
| Body Height | 154.5 mm | 154.5 mm |
| Weight | 156.2 g | 156.2 g |
| Usable Surface | 85.2 % | 85.2 % |
| Body Materials | Glass, Aluminium Alloy | Glass, Aluminium Alloy |
| Unfolded thickness | — | 7.4 mm |
Battery
| Specification | X21 UD | X21 |
|---|---|---|
| Battery Capacity | 3,200 mAh | 3,200 mAh |
| Battery Type | Li-Ion | Li-Ion |
| Fast Charge Power | 18 W | 18 W |
| Battery Features | Fast Charging, Battery Level Indicator, Rechargeable | Fast Charging, Battery Level Indicator, Rechargeable |
Display
| Specification | X21 UD | X21 |
|---|---|---|
| Display Aspect Ratio | 19:9 | 19:9 |
| Display Technology | Super AMOLED | Super AMOLED |
| Display Diagonal | 6.28″ | 6.28″ |
| Display Horizontal Resolution | 1,080 px | 1,080 px |
| Display Vertical Resolution | 2,280 px | 2,280 px |
| Display Pixel Density | 402 ppi | 402 ppi |
| Display Features | Gorilla Glass 3, Touchscreen | Gorilla Glass 3, Capacitive Touch, Touchscreen |
Sensors
| Specification | X21 UD | X21 |
|---|---|---|
| Fingerprint Sensor Placement | Under Display | Rear |
Sensor
| Specification | X21 UD | X21 |
|---|---|---|
| Sensor Features | Fingerprint Sensor, Accelerometer, Proximity Sensor, Compass, Gyroscope | Fingerprint Sensor, Accelerometer, Proximity Sensor, Compass, Gyroscope |
Software
| Specification | X21 UD | X21 |
|---|---|---|
| Operating System | Android 8.1 | Android 8 |
| OS Family | Android | Android |
| OS Version | 8 | 8 |
Connectivity
| Specification | X21 UD | X21 |
|---|---|---|
| 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 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 |
| Cellular Technologies | GSM, HSPA, LTE, 4G | GSM, CDMA, HSPA, UMTS, LTE, 4G |
| Wi-Fi Standards | Wi-Fi 802.11a/b/g/n/ac | 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 | GPS, GLONASS |
| Connectivity Features | 3.5 mm Audio Jack, FM Radio, microUSB, USB 2.0, USB OTG | 3.5 mm Audio Jack, FM Radio, USB OTG, microUSB |
| USB Version | microUSB | 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 UD | X21 |
|---|---|---|
| Microphone Count | 2 | 2 |
| Audio Features | A2DP, LE, Loudspeaker, 32-bit/192 kHz Audio | A2DP, LE, Loudspeaker, 32-bit/192 kHz Audio |
Technical
| Specification | X21 UD | X21 |
|---|---|---|
| Model numbers | X21UD A | 1725, X21A |
