Product
Vivo Y83 Pro
Vivo Y83 Pro
Xiaomi Redmi Note 4X
Xiaomi Redmi Note 4X
Battery
Type Li-Ion 3260 mAh, non-removable Li-Po 4100 mAh, non-removable
Body
Build - Glass front, aluminum back, aluminum frame
Dimensions 155.2 x 75.2 x 7.7 mm (6.11 x 2.96 x 0.30 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 152 g (5.36 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 GPS, GLONASS, BDS
Radio FM radio FM radio
USB microUSB 2.0, OTG microUSB 2.0, OTG
WLAN Wi-Fi 802.11 a/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 (~82.7% screen-to-body ratio) 5.5 inches, 83.4 cm2 (~72.7% 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 2018, September. Released 2018, September 2017, February. Released 2017, February
Status Discontinued Discontinued
Main Camera
Dual 13 MP, f/2.2, PDAF 2 MP, f/2.4, (depth) -
Features LED flash, HDR, panorama Dual-LED dual-tone flash, panorama, HDR
Single - 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 64GB 4GB RAM 16GB 3GB RAM, 32GB 3GB RAM, 64GB 4GB RAM
  eMMC 5.1 eMMC 5.1
Misc
Colors Nebula Purple, Black, Gold Platinum Silver, Champagne Gold, Matte Black, Hatsune Miku, Sakura Powder
SAR 1.12 W/kg (head)     0.53 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, 40, 41 1, 3, 5, 7, 38, 39, 40, 41 - Snapdragon model
Speed HSPA, LTE 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 MT6762 Helio P22 (12 nm) Qualcomm MSM8953 Snapdragon 625 (14 nm)
CPU Octa-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
Features HDR -
Single 8 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