| Product |
Vivo X21
|
Xiaomi Mi 6
|
| Battery |
| Charging |
18W wired |
18W wired, QC3 |
| Type |
Li-Ion 3200 mAh, non-removable |
Li-Po 3350 mAh, non-removable |
| Body |
| Build |
Glass front (Gorilla Glass 3), aluminum back, aluminum frame |
Glass front (Gorilla Glass 4), glass back, stainless steel frame |
| Dimensions |
154.5 x 74.8 x 7.4 mm (6.08 x 2.94 x 0.29 in) |
145.2 x 70.5 x 7.5 mm (5.72 x 2.78 x 0.30 in) |
| SIM |
Nano-SIM + Nano-SIM |
Nano-SIM + Nano-SIM |
| Weight |
156.2 g (5.50 oz) |
168 g / 182 g (Ceramic) (5.93 oz) |
|
- |
Water-repellent coating |
| Comms |
| Bluetooth |
5.0, A2DP, LE |
5.0, A2DP, LE |
| Infrared port |
- |
Yes |
| NFC |
No |
Yes |
| Positioning |
GPS, GLONASS |
GPS, GLONASS, BDS |
| Radio |
FM radio |
No |
| USB |
microUSB 2.0, OTG |
USB Type-C |
| 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, DLNA |
| Display |
| Protection |
Corning Gorilla Glass 3 |
Corning Gorilla Glass 4 |
| Resolution |
1080 x 2280 pixels, 19:9 ratio (~402 ppi density) |
1080 x 1920 pixels, 16:9 ratio (~428 ppi density) |
| Size |
6.28 inches, 98.4 cm2 (~85.2% screen-to-body ratio) |
5.15 inches, 73.1 cm2 (~71.4% screen-to-body ratio) |
| Type |
Super AMOLED |
IPS LCD |
| Features |
| Sensors |
Fingerprint (rear-mounted), accelerometer, proximity, compass |
Fingerprint (front-mounted), accelerometer, gyro, proximity, compass, barometer |
| Launch |
| Announced |
2018, March. Released 2018, March |
2017, April. Released 2017, April |
| Status |
Discontinued |
Discontinued |
| Main Camera |
| Dual |
|
|
| Features |
LED flash, HDR, panorama |
Dual-LED dual-tone flash, HDR, panorama |
| Video |
1080p@30fps |
4K@30fps, 1080p@30fps, 720p@120fps |
| Memory |
| Card slot |
microSDXC (uses shared SIM slot) |
No |
| Internal |
64GB 6GB RAM, 128GB 6GB RAM |
64GB 4GB RAM, 64GB 6GB RAM, 128GB 6GB RAM |
|
eMMC 5.1 |
- |
| Misc |
| Colors |
Black, Aurora White, Ruby Red |
Ceramic Black, Black, Blue, White |
| Models |
1725, X21A |
MCE16 |
| SAR |
- |
|
| Network |
| 2G bands |
GSM 850 / 900 / 1800 / 1900 |
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 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, 38, 39, 40, 41 |
| Speed |
HSPA 42.2/5.76 Mbps, LTE (2CA) Cat6 300/50 Mbps |
HSPA 42.2/5.76 Mbps, LTE (3CA) Cat9 450/50 Mbps |
| Technology |
GSM / CDMA / HSPA / LTE |
GSM / HSPA / LTE |
|
CDMA 800 & TD-SCDMA |
- |
| Our Tests |
| Audio quality |
- |
Noise -94.3dB / Crosstalk -90.9dB |
| Battery (old) |
- |
Endurance rating 80h |
| Camera |
- |
Photo / Video |
| Display |
- |
Contrast ratio: 1305:1 (nominal), 3.767 (sunlight) |
| Loudspeaker |
- |
Voice 66dB / Noise 69dB / Ring 84dB |
| Performance |
- |
GeekBench: 6719 (v4.4)
GFXBench: 25fps (ES 3.1 onscreen) |
| Platform |
| Chipset |
Qualcomm SDM660 Snapdragon 660 (14 nm) |
Qualcomm MSM8998 Snapdragon 835 (10 nm) |
| CPU |
Octa-core (4x2.2 GHz Kryo 260 Gold & 4x1.8 GHz Kryo 260 Silver) |
Octa-core (4x2.45 GHz Kryo & 4x1.9 GHz Kryo) |
| GPU |
Adreno 512 |
Adreno 540 |
| OS |
Android 8.1 (Oreo), Funtouch 4 |
Android 7.1.1 (Nougat), upgradable to Android 9.0 (Pie), MIUI 8 |
| Selfie camera |
| Single |
|
8 MP |
| Video |
1080p@30fps |
1080p@30fps |
| Sound |
| 3.5mm jack |
Yes |
No |
| Loudspeaker |
Yes |
Yes, with stereo speakers |
|
32-bit/192kHz Hi-Res audio |
- |
