Product
Vivo Z1i
Vivo Z1i
Xiaomi Redmi 4 Prime
Xiaomi Redmi 4 Prime
Battery
Charging - 10W wired
Type Li-Ion 3260 mAh, non-removable Li-Po 4100 mAh, non-removable
Body
Build Glass front, plastic back, plastic frame Glass front, aluminum back, aluminum frame
Dimensions 154.8 x 75 x 7.9 mm (6.09 x 2.95 x 0.31 in) 141.3 x 69.6 x 8.9 mm (5.56 x 2.74 x 0.35 in)
SIM Nano-SIM + Nano-SIM Hybrid Dual SIM
Weight 149.3 g (5.26 oz) 156 g (5.50 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 a/b/g/n/ac, dual-band, Wi-Fi Direct Wi-Fi 802.11 a/b/g/n, dual-band, Wi-Fi Direct
Display
Resolution 1080 x 2280 pixels, 19:9 ratio (~403 ppi density) 1080 x 1920 pixels, 16:9 ratio (~441 ppi density)
Size 6.26 inches, 97.8 cm2 (~84.2% screen-to-body ratio) 5.0 inches, 68.9 cm2 (~70.1% 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, July. Released 2018, July 2016, November. Released 2016, November
Status Discontinued Discontinued
Main Camera
Dual 13 MP, f/2.2, PDAF 2 MP, (depth) -
Features LED flash, HDR, panorama Dual-LED dual-tone flash, HDR, panorama
Single - 13 MP, f/2.2, PDAF
Video 4K@30fps, 1080p@30fps 1080p@30fps
Memory
Card slot microSDXC (uses shared SIM slot) microSDXC (uses shared SIM slot)
Internal 128GB 4GB RAM, 128GB 8GB RAM 32GB 3GB RAM
  eMMC 5.1 eMMC 5.1
Misc
Colors Black, Red Gold, Dark Gray, Silver
Models V1730DA, V1730DT -
Network
2G bands GSM 850 / 900 / 1800 / 1900 GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
3G bands HSDPA 850 / 900 / 1700(AWS) / 2100 HSDPA 850 / 900 / 1900 / 2100
4G bands 1, 3, 4, 5, 8, 39, 40, 41 1, 3, 7, 38, 39, 40, 41
Speed HSPA 42.2/5.76 Mbps, LTE (2CA) Cat6 300/50 Mbps HSPA 42.2/5.76 Mbps, LTE (2CA) Cat6 300/50 Mbps
Technology GSM / CDMA / HSPA / LTE GSM / CDMA / HSPA / EVDO / LTE
  CDMA 800 & TD-SCDMA CDMA2000 1xEV-DO & TD-SCDMA
Our Tests
Battery (old) - Endurance rating 91h
Camera - Photo / Video
Platform
Chipset Qualcomm SDM636 Snapdragon 636 (14 nm) Qualcomm MSM8953 Snapdragon 625 (14 nm)
CPU Octa-core (4x1.8 GHz Kryo 260 Gold & 4x1.6 GHz Kryo 260 Silver) Octa-core 2.0 GHz Cortex-A53
GPU Adreno 509 Adreno 506
OS Android 8.1 (Oreo), Funtouch 4 Android 6.0.1 (Marshmallow), MIUI 8
Selfie camera
Single 16 MP, f/2.0, 26mm (wide), 1/3.06", 1.0µm 5 MP, f/2.2
Video 1080p@30fps 1080p@30fps
Sound
3.5mm jack Yes Yes
Loudspeaker Yes Yes