| Product |
Vivo X21 UD
|
Xiaomi Redmi K20 Pro Premium
|
| Battery |
| Charging |
18W wired |
27W wired, QC4 |
| Type |
Li-Ion 3200 mAh, non-removable |
Li-Po 4000 mAh, non-removable |
| Body |
| Build |
Glass front (Gorilla Glass 3), aluminum back, aluminum frame |
Glass front (Gorilla Glass 5), glass back (Gorilla Glass 5), aluminum frame |
| Dimensions |
154.5 x 74.8 x 7.4 mm (6.08 x 2.94 x 0.29 in) |
156.7 x 74.3 x 8.8 mm (6.17 x 2.93 x 0.35 in) |
| SIM |
Nano-SIM + Nano-SIM |
Nano-SIM + Nano-SIM |
| Weight |
156.2 g (5.50 oz) |
191 g (6.74 oz) |
| Comms |
| Bluetooth |
5.0, A2DP, LE |
5.0, A2DP, LE, aptX HD |
| NFC |
No |
Yes |
| Positioning |
GPS, GLONASS |
GPS (L1+L5), GLONASS (G1), BDS (B1), GALILEO (E1+E5a) |
| Radio |
FM radio |
Yes |
| USB |
microUSB 2.0, OTG |
USB Type-C 2.0, OTG |
| WLAN |
Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct |
Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct |
| Display |
| Protection |
Corning Gorilla Glass 3 |
Corning Gorilla Glass 5 |
| Resolution |
1080 x 2280 pixels, 19:9 ratio (~402 ppi density) |
1080 x 2340 pixels, 19.5:9 ratio (~403 ppi density) |
| Size |
6.28 inches, 98.4 cm2 (~85.2% screen-to-body ratio) |
6.39 inches, 100.2 cm2 (~86.1% screen-to-body ratio) |
| Type |
Super AMOLED |
Super AMOLED, HDR10 |
| Features |
| Sensors |
Fingerprint (under display, optical), accelerometer, proximity, compass |
Fingerprint (under display, optical), accelerometer, gyro, proximity, compass |
| Launch |
| Announced |
2018, March. Released 2018, March |
2019, September. Released 2019, September |
| Status |
Discontinued |
Discontinued |
| Main Camera |
| Dual |
12 MP, f/1.8, 1/2.55", 1.4µm, dual pixel PDAF
5 MP, f/2.4, (depth) |
- |
| Features |
LED flash, HDR, panorama |
Laser AF, Dual-LED flash, HDR, panorama |
| Triple |
- |
48 MP, f/1.8, 26mm (wide), 1/2.0", 0.8µm, PDAF
8 MP, f/2.4, 53mm (telephoto), 1/4.0", 1.12µm, PDAF, 2x optical zoom
13 MP, f/2.4, 12mm (ultrawide), 1/3.1", 1.12µm |
| Video |
1080p@30fps |
4K@30/60fps, 1080p@30/120/240fps, 1080p@960fps |
| Memory |
| Card slot |
microSDXC (uses shared SIM slot) |
No |
| Internal |
128GB 6GB RAM |
128GB 8GB RAM, 512GB 8GB RAM, 512GB 12GB RAM |
| |
eMMC 5.1 |
UFS 2.1 |
| Misc |
| Colors |
Black, Ruby Red |
Carbon black, Flame red, Glacier blue, Summer Honey, Pearl White |
| Models |
X21UD A |
- |
| Network |
| 2G bands |
GSM 850 / 900 / 1800 / 1900 |
GSM 850 / 900 / 1800 / 1900 |
| 3G bands |
HSDPA 850 / 900 / 1900 / 2100 |
HSDPA 850 / 900 / 1900 / 2100 |
| 4G bands |
1, 2, 3, 5, 8, 34, 38, 39, 40, 41 |
1, 3, 5, 7, 8, 34, 38, 39, 40, 41 |
| Speed |
HSPA 42.2/5.76 Mbps, LTE (2CA) Cat6 300/50 Mbps |
HSPA, LTE |
| Technology |
GSM / CDMA / HSPA / LTE |
GSM / CDMA / HSPA / LTE |
| |
CDMA 800 & TD-SCDMA |
CDMA 800 & TD-SCDMA |
| Platform |
| Chipset |
Qualcomm SDM660 Snapdragon 660 (14 nm) |
Qualcomm SM8150 Snapdragon 855+ (7 nm) |
| CPU |
Octa-core (4x2.2 GHz Kryo 260 Gold & 4x1.8 GHz Kryo 260 Silver) |
Octa-core (1x2.96 GHz Kryo 485 & 3x2.42 GHz Kryo 485 & 4x1.8 GHz Kryo 485) |
| GPU |
Adreno 512 |
Adreno 640 (700 MHz) |
| OS |
Android 8.1 (Oreo), Funtouch 4 |
Android 10, MIUI 11 |
| Selfie camera |
| Features |
- |
HDR |
| Single |
12 MP, f/2.0, (wide), 1/2.8", 1.28µm |
Motorized pop-up 20 MP, f/2.2, (wide), 1/3.4", 0.8µm |
| Video |
1080p@30fps |
1080p@30fps |
| Sound |
| 3.5mm jack |
Yes |
Yes |
| Loudspeaker |
Yes |
Yes |
| |
32-bit/192kHz Hi-Res audio |
24-bit/192kHz Hi-Res audio |
