| Product |
Vivo Y91 (Mediatek)
|
Xiaomi Redmi 4 (4X)
|
| Battery |
| Music play |
- |
Up to 87 h |
| Stand-by |
- |
Up to 432 h (3G) |
| Talk time |
- |
Up to 36 h (3G) |
| Type |
4030 mAh, non-removable |
Li-Po 4100 mAh, non-removable |
| Body |
| Build |
- |
Glass front (Gorilla Glass), aluminum back, aluminum frame, plastic ends |
| Dimensions |
155.1 x 75.1 x 8.3 mm (6.11 x 2.96 x 0.33 in) |
139.2 x 70 x 8.7 mm (5.48 x 2.76 x 0.34 in) |
| SIM |
Nano-SIMNano-SIM + Nano-SIM |
Nano-SIM + Micro-SIM |
| Weight |
163.5 g (5.78 oz) |
150 g (5.29 oz) |
| Comms |
| Bluetooth |
5.0, A2DP, LE |
4.2, A2DP, LE |
| Infrared port |
- |
Yes |
| NFC |
No |
No |
| Positioning |
GPS, GLONASS, BDS |
GPS, GLONASS, BDS |
| Radio |
FM radio |
FM radio |
| USB |
microUSB 2.0, OTG |
microUSB 2.0 |
| WLAN |
Wi-Fi 802.11 b/g/n, Wi-Fi Direct |
Wi-Fi 802.11 b/g/n, Wi-Fi Direct |
| Display |
| Protection |
- |
Corning Gorilla Glass (unspecified version) |
| Resolution |
720 x 1520 pixels, 19:9 ratio (~270 ppi density) |
720 x 1280 pixels, 16:9 ratio (~294 ppi density) |
| Size |
6.22 inches, 96.6 cm2 (~82.9% screen-to-body ratio) |
5.0 inches, 68.9 cm2 (~70.7% screen-to-body ratio) |
| Type |
IPS LCD |
IPS LCD |
| Features |
| Sensors |
Fingerprint (rear-mounted), accelerometer, proximity, compass |
Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass |
| Launch |
| Announced |
2019, January. Released 2019, January |
2017, May. Released 2017, May |
| Status |
Discontinued |
Discontinued |
| Main Camera |
| Dual |
13 MP, f/2.2, PDAF
2 MP, f/2.4, (depth) |
- |
| Features |
LED flash, panorama |
LED flash, HDR, panorama |
| Single |
- |
13 MP, f/2.0, PDAF |
| Video |
1080p@30fps |
1080p@30fps |
| Memory |
| Card slot |
microSDXC |
microSDXC (uses shared SIM slot) |
| Internal |
64GB 3GB RAM |
16GB 2GB RAM, 16GB 3GB RAM, 32GB 3GB RAM, 64GB 3GB RAM, 64GB 4GB RAM |
| |
eMMC 5.1 |
eMMC 5.1 |
| Misc |
| Colors |
Starry Black, Ocean Blue |
Black, Gold |
| Models |
- |
2016060, 2016090, MAG138, MAE136, Redmi 4, Redmi 4X |
| SAR |
- |
0.77 W/kg (head) 0.83 W/kg (body) |
| Network |
| 2G bands |
GSM 850 / 900 / 1800 / 1900 |
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G bands |
HSDPA 850 / 900 / 2100 |
HSDPA 850 / 900 / 1900 / 2100 |
| 4G bands |
1, 3, 5, 7, 8, 38, 40, 41 |
1, 3, 5, 7, 8, 38, 39, 40, 41 |
| Speed |
HSPA 42.2/5.76 Mbps, LTE Cat5 150/75 Mbps |
HSPA 42.2/5.76 Mbps, LTE (2CA) Cat6 300/100 Mbps |
| Technology |
GSM / HSPA / LTE |
GSM / HSPA / LTE |
| Our Tests |
| Audio quality |
- |
Noise -94.3dB / Crosstalk -94dB |
| Battery (old) |
- |
Endurance rating 80h |
| Camera |
- |
Photo / Video |
| Display |
- |
Contrast ratio: 915 (nominal), 2.920 (sunlight) |
| Loudspeaker |
- |
Voice 64dB / Noise 70dB / Ring 72dB |
| Performance |
- |
GeekBench: 1819 (v4.4)
GFXBench: 5.1fps (ES 3.1 onscreen) |
| Platform |
| Chipset |
Mediatek MT6762 Helio P22 (12 nm) |
Qualcomm MSM8940 Snapdragon 435 (28 nm) |
| CPU |
Octa-core 2.0 GHz Cortex-A53 |
Octa-core 1.4 GHz Cortex-A53 |
| GPU |
PowerVR GE8320 |
Adreno 505 |
| OS |
Android 8.1 (Oreo), Funtouch 4.5 |
Android 6.0.1 (Marshmallow), upgradable to 7.1.2 (Nougat), MIUI 11 |
| Selfie camera |
| Single |
8 MP, f/1.8 |
5 MP, f/2.2 |
| Video |
|
1080p@30fps |
| Sound |
| 3.5mm jack |
Yes |
Yes |
| Loudspeaker |
Yes |
Yes |
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