Product
Vivo V9
Vivo V9
Xiaomi Mi 4c
Xiaomi Mi 4c
Battery
Charging - 18W wired, QC2, 40% in 60 min
Type Li-Ion 3260 mAh, non-removable Li-Ion 3080 mAh, non-removable
Body
Build Glass front, plastic back, plastic frame Glass front, plastic back, plastic frame
Dimensions 154.8 x 75.1 x 7.9 mm (6.09 x 2.96 x 0.31 in) 138.1 x 69.6 x 7.8 mm (5.44 x 2.74 x 0.31 in)
SIM Nano-SIM + Nano-SIM Dual SIM
Weight 150 g (5.29 oz) 132 g (4.66 oz)
Comms
Bluetooth 4.2, A2DP, LE 4.1, A2DP
Infrared port - Yes
NFC No No
Positioning GPS, GLONASS, BDS GPS, GLONASS, BDS
Radio FM radio, recording 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, hotspot
Display
Resolution 1080 x 2280 pixels, 19:9 ratio (~400 ppi density) 1080 x 1920 pixels, 16:9 ratio (~441 ppi density)
Size 6.3 inches, 99.1 cm2 (~85.2% screen-to-body ratio) 5.0 inches, 68.9 cm2 (~71.7% screen-to-body ratio)
Type IPS LCD IPS LCD
Features
Sensors Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass Accelerometer, gyro, proximity, compass
Launch
Announced 2018, March. Released 2018, April 2015, September. Released 2015, September
Status Discontinued Discontinued
Main Camera
Dual 16 MP, f/2.0, PDAF 5 MP, f/2.4, (depth) -
Features Dual-LED flash, HDR, panorama Dual-LED dual-tone flash, panorama, HDR
Single - 13 MP, f/2.0, 24mm (wide), 1/3.1", 1.12µm, PDAF
Video 4K@30fps, 1080p@30fps 1080p@30fps
Memory
Card slot microSDXC (dedicated slot) No
Internal 64GB 4GB RAM 16GB 2GB RAM, 32GB 3GB RAM
  eMMC 5.1 eMMC 5.0
Misc
Colors Gold, Black, Sapphire Blue White, grey, pink, yellow, blue
Models 1723 Mi-4c
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, 3, 5, 8, 38, 40, 41 1, 3, 7, 38, 39, 40, 41
Speed HSPA 42.2/5.76 Mbps, LTE (2CA) Cat6 300/50 Mbps HSPA, LTE Cat4 150/50 Mbps
Technology GSM / HSPA / LTE GSM / HSPA / LTE
  - TD-SCDMA
Our Tests
Audio quality - Noise -94.7dB / Crosstalk -95.3dB
Battery (old) - Endurance rating 52h
Camera - Photo / Video
Display - Contrast ratio: 1609 (nominal), 2.574(sunlight)
Loudspeaker - Voice 73dB / Noise 66dB / Ring 77dB
Performance - Basemark OS II 2.0: 1233Basemark X: 12096
Platform
Chipset Qualcomm MSM8953-Pro Snapdragon 626 (14 nm) Qualcomm MSM8992 Snapdragon 808 (20 nm)
CPU Octa-core 2.2 GHz Cortex-A53 Hexa-core (4x1.4 GHz Cortex-A53 & 2x1.8 GHz Cortex-A57)
GPU Adreno 506 Adreno 418
OS Android 8.1 (Oreo), Funtouch 4 Android 5.1.1 (Lollipop), upgradable to 7.0 (Nougat), MIUI 10
Selfie camera
Single 24 MP, f/2.0, 26mm (wide), 1/2.8", 0.9µm 5 MP, f/2.0
Video 1080p@30fps 1080p@30fps
Sound
3.5mm jack Yes Yes
Loudspeaker Yes Yes