Product
Vivo Z1i
Vivo Z1i
Xiaomi Redmi Note 5 AI Dual Camera
Xiaomi Redmi Note 5 AI Dual Camera
Battery
Charging - 18W wired, QC3
Type Li-Ion 3260 mAh, non-removable Li-Po 4000 mAh, non-removable
Body
Build Glass front, plastic back, plastic frame Glass front (Gorilla Glass), aluminum back, aluminum frame
Dimensions 154.8 x 75 x 7.9 mm (6.09 x 2.95 x 0.31 in) 158.6 x 75.4 x 8.1 mm (6.24 x 2.97 x 0.32 in)
SIM Nano-SIM + Nano-SIM Nano-SIM + Nano-SIM
Weight 149.3 g (5.26 oz) 181 g (6.38 oz)
Comms
Bluetooth 5.0, A2DP, LE 5.0, 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
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
Display
Protection - Corning Gorilla Glass (unspecified version)
Resolution 1080 x 2280 pixels, 19:9 ratio (~403 ppi density) 1080 x 2160 pixels, 18:9 ratio (~403 ppi density)
Size 6.26 inches, 97.8 cm2 (~84.2% screen-to-body ratio) 5.99 inches, 92.6 cm2 (~77.4% 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 2018, March. Released 2018, March
Status Discontinued Discontinued
Main Camera
Dual 13 MP, f/2.2, PDAF 2 MP, (depth) 12 MP, f/1.9, 1/2.55", 1.4µm, dual pixel PDAF 5 MP, f/2.0, (depth)
Features LED flash, HDR, panorama Dual-LED flash, panorama, HDR
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, 64GB 4GB RAM, 64GB 6GB RAM
  eMMC 5.1 eMMC 5.1
Misc
Colors Black, Red Black, Gold, Rose Gold, Blue, Flame Red
Models V1730DA, V1730DT M1803E7SG, M1803E7SH
SAR - 0.79 W/kg (head)     1.03 W/kg (body)    
Network
2G bands GSM 850 / 900 / 1800 / 1900 GSM 850 / 900 / 1800 / 1900
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, 5, 7, 8, 34, 38, 39, 40, 41 - China
Speed HSPA 42.2/5.76 Mbps, LTE (2CA) Cat6 300/50 Mbps HSPA, LTE
Technology GSM / CDMA / HSPA / LTE GSM / CDMA / HSPA / LTE
  CDMA 800 & TD-SCDMA 1, 2, 3, 4, 5, 7, 8, 20, 28, 38, 40 - Taiwan
Our Tests
Audio quality - Noise -89.4dB / Crosstalk -90.5dB
Battery (old) - Endurance rating 92h
Camera - Photo / Video
Display - Contrast ratio: 1893 (nominal), 3.393 (sunlight)
Loudspeaker - Voice 68dB / Noise 71dB / Ring 84dB
Performance - AnTuTu: 115195 (v7) GeekBench: 4918 (v4.4) GFXBench: 6fps (ES 3.1 onscreen)
Platform
Chipset Qualcomm SDM636 Snapdragon 636 (14 nm) Qualcomm SDM636 Snapdragon 636 (14 nm)
CPU Octa-core (4x1.8 GHz Kryo 260 Gold & 4x1.6 GHz Kryo 260 Silver) Octa-core (4x1.8 GHz Kryo 260 Gold & 4x1.6 GHz Kryo 260 Silver)
GPU Adreno 509 Adreno 509
OS Android 8.1 (Oreo), Funtouch 4 Android 8.0 (Oreo), MIUI 9
Selfie camera
Features - LED flash
Single 16 MP, f/2.0, 26mm (wide), 1/3.06", 1.0µm 13 MP, f/2.0, (wide), 1/3.1", 1.12µm
Video 1080p@30fps 1080p@30fps
Sound
3.5mm jack Yes Yes
Loudspeaker Yes Yes