Product
Xiaomi Redmi Note 2
Xiaomi Redmi Note 2
Vivo Z1x
Vivo Z1x
Battery
Charging 10W wired 22.5W wired 5W reverse wired
Music play Up to 46 h -
Stand-by Up to 144 h (3G) -
Talk time Up to 11 h 30 min (3G) -
Type Li-Po 3060 mAh, removable 4500 mAh, non-removable
Body
Build Glass front, plastic back, plastic frame Glass front, plastic back, plastic frame
Dimensions 152 x 76 x 8.3 mm (5.98 x 2.99 x 0.33 in) 159.5 x 75.2 x 8.1 mm (6.28 x 2.96 x 0.32 in)
SIM Dual SIM (Micro-SIM, dual stand-by) Nano-SIM + Nano-SIM
Weight 160 g (5.64 oz) 189.6 g (6.70 oz)
Comms
Bluetooth 4.0, A2DP, LE 5.0, A2DP, LE, aptX
Infrared port Yes -
NFC No No
Positioning GPS, GLONASS, BDS GPS, GLONASS
Radio Stereo FM radio FM radio
USB microUSB 2.0, OTG USB Type-C 2.0, OTG
WLAN Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct
Display
Resolution 1080 x 1920 pixels, 16:9 ratio (~403 ppi density) 1080 x 2340 pixels, 19.5:9 ratio (~404 ppi density)
Size 5.5 inches, 82.6 cm2 (~71.5% screen-to-body ratio) 6.38 inches, 99.9 cm2 (~83.3% screen-to-body ratio)
Type IPS LCD Super AMOLED
Features
Sensors Accelerometer, gyro, proximity, compass Fingerprint (under display, optical), accelerometer, proximity, compass
Launch
Announced 2015, August. Released 2015, August 2019, September. Released 2019, September
Status Discontinued Discontinued
Main Camera
Features LED flash, HDR, panorama LED flash, HDR, panorama
Single 13 MP, f/2.2, PDAF -
Triple - 48 MP, f/1.8, (wide), 1/2.0", 0.8µm, PDAF 8 MP, f/2.2, 13mm (ultrawide) 2 MP, f/2.4, (depth)
Video 1080p@30fps 4K@30fps, 1080p@30fps
Memory
Card slot microSDXC (dedicated slot) - Chinese version only No
Internal 16GB 2GB RAM (Standard), 32GB 2GB RAM (Prime) 64GB 6GB RAM, 128GB 4GB RAM, 128GB 6GB RAM, 128GB 8GB RAM
  eMMC 5.0 UFS 2.1
Misc
Colors White, blue, yellow, pink, mint green Fusion Blue, Phantom Purple
Models 2015051 1917, PD1921F_EX
SAR 0.34 W/kg (head)     0.45 W/kg (body)     1.03 W/kg (head)     0.55 W/kg (body)    
Network
2G bands GSM 900 / 1800 / 1900 - SIM 1 & SIM 2 GSM 850 / 900 / 1800 / 1900
3G bands HSDPA 850 / 900 / 1900 / 2100 HSDPA 850 / 900 / 2100
4G bands 1, 3, 7, 38, 39, 40, 41 1, 3, 5, 8, 38, 40, 41
Speed HSPA, LTE Cat4 150/50 Mbps HSPA, LTE
Technology GSM / HSPA / LTE GSM / HSPA / LTE
  TD-SCDMA -
Our Tests
Audio quality Noise -96.1dB / Crosstalk -94.8dB -
Battery (old) Endurance rating 49h -
Camera Photo / Video -
Display Contrast ratio: 953 (nominal), 2.166 (sunlight) -
Loudspeaker Voice 66dB / Noise 66dB / Ring 76dB -
Performance Basemark OS II 2.0: 1063Basemark X: 8518 -
Platform
Chipset Mediatek MT6795 Helio X10 (28 nm) Qualcomm SDM712 Snapdragon 712 (10 nm)
CPU Octa-core 2.0 GHz Cortex-A53 - Redmi Note 2Octa-core 2.2 GHz Cortex-A53 - Redmi Note 2 Prime Octa-core (2x2.3 GHz Kryo 360 Gold & 6x1.7 GHz Kryo 360 Silver)
GPU PowerVR G6200 Adreno 616
OS Android 5.0 (Lollipop), MIUI 7 Android 9.0 (Pie), upgradable to Android 10, Funtouch 10
Selfie camera
Features - HDR
Single 5 MP, f/2.0 32 MP, f/2.0, 26mm (wide), 1/2.8", 0.8µm
Video 720p 1080p@30fps
Sound
3.5mm jack Yes Yes
Loudspeaker Yes Yes