| Product |
Vivo Y81i
|
Xiaomi Redmi Note 4X
|
| Battery |
| Type |
3260 mAh, non-removable |
Li-Po 4100 mAh, non-removable |
| Body |
| Build |
Glass front (Gorilla Glass), plastic back, plastic frame |
Glass front, aluminum back, aluminum frame |
| Dimensions |
155.1 x 75 x 7.8 mm (6.11 x 2.95 x 0.31 in) |
151 x 76 x 8.5 mm (5.94 x 2.99 x 0.33 in) |
| SIM |
Nano-SIM + Nano-SIM |
Nano-SIM + Micro-SIM |
| Weight |
143 g (5.04 oz) |
165 g (5.82 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, OTG |
| WLAN |
Wi-Fi 802.11 b/g/n, Wi-Fi Direct |
Wi-Fi 802.11 a/b/g/n, Wi-Fi Direct |
| Display |
| Protection |
Corning Gorilla Glass |
- |
| Resolution |
720 x 1520 pixels, 19:9 ratio (~270 ppi density) |
1080 x 1920 pixels, 16:9 ratio (~401 ppi density) |
| Size |
6.22 inches, 96.6 cm2 (~83.0% screen-to-body ratio) |
5.5 inches, 83.4 cm2 (~72.7% screen-to-body ratio) |
| Type |
IPS LCD |
IPS LCD |
| Features |
| Sensors |
Accelerometer, proximity, compass |
Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass |
| Launch |
| Announced |
2018, October. Released 2018, November |
2017, February. Released 2017, February |
| Status |
Discontinued |
Discontinued |
| Main Camera |
| Features |
LED flash, HDR, panorama |
Dual-LED dual-tone flash, panorama, HDR |
| Single |
13 MP, f/2.2, PDAF |
13 MP, f/2.0, 1/3.1", 1.12µm, PDAF |
| Video |
1080p@30fps |
1080p@30fps, 720p@120fps |
| Memory |
| Card slot |
microSDXC (dedicated slot) |
microSDXC (uses shared SIM slot) |
| Internal |
16GB 2GB RAM |
16GB 3GB RAM, 32GB 3GB RAM, 64GB 4GB RAM |
| |
eMMC 5.1 |
eMMC 5.1 |
| Misc |
| Colors |
Black, Red |
Platinum Silver, Champagne Gold, Matte Black, Hatsune Miku, Sakura Powder |
| Models |
1812, 1812_19 |
- |
| 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, 38, 39, 40, 41 - Snapdragon model |
| Speed |
HSPA 21.1/5.76 Mbps, LTE (2CA) Cat7 300/150 Mbps |
HSPA 42.2/5.76 Mbps, LTE (2CA) Cat6 300/50 Mbps |
| Technology |
GSM / HSPA / LTE |
GSM / CDMA / HSPA / LTE |
| |
- |
1, 3, 5, 7, 8, 38, 39, 40, 41 - Mediatek model |
| Platform |
| Chipset |
Mediatek MT6761 Helio A22 (12 nm) |
Qualcomm MSM8953 Snapdragon 625 (14 nm) |
| CPU |
Quad-core 2.0 GHz Cortex-A53 |
Octa-core 2.0 GHz Cortex-A53 |
| GPU |
PowerVR GE8320 |
Adreno 506 |
| OS |
Android 8.1 (Oreo), Funtouch 4 |
Android 6.0 (Marshmallow), upgradable to 7.0 (Nougat), MIUI 10 |
| Selfie camera |
| Single |
5 MP, f/2.2 |
5 MP, f/2.0 |
| Video |
|
1080p@30fps |
| Sound |
| 3.5mm jack |
Yes |
Yes |
| Loudspeaker |
Yes |
Yes |
| |
- |
24-bit/192kHz audio |
