Product
Vivo Z1i
Vivo Z1i
Xiaomi Redmi Note 7S
Xiaomi Redmi Note 7S
Battery
Charging - 18W wired, QC4
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 5), glass back (Gorilla Glass 5), plastic frame
Dimensions 154.8 x 75 x 7.9 mm (6.09 x 2.95 x 0.31 in) 159.2 x 75.2 x 8.1 mm (6.27 x 2.96 x 0.32 in)
SIM Nano-SIM + Nano-SIM Nano-SIM + Nano-SIM
Weight 149.3 g (5.26 oz) 186 g (6.56 oz)
  - Splash resistant
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, recording
USB microUSB 2.0, OTG USB Type-C 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 5
Resolution 1080 x 2280 pixels, 19:9 ratio (~403 ppi density) 1080 x 2340 pixels, 19.5:9 ratio (~409 ppi density)
Size 6.26 inches, 97.8 cm2 (~84.2% screen-to-body ratio) 6.3 inches, 97.4 cm2 (~81.4% 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 2019, May. Released 2019, May
Status Discontinued Discontinued
Main Camera
Dual 13 MP, f/2.2, PDAF 2 MP, (depth) 48 MP, f/1.8, (wide), 1/2.0", 0.8µm, PDAF 5 MP, f/2.2, (depth)
Features LED flash, HDR, panorama Dual-LED flash, HDR, panorama
Video 4K@30fps, 1080p@30fps 1080p@30/60/120fps, (gyro-EIS)
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
  eMMC 5.1 eMMC 5.1
Misc
Colors Black, Red Onyx Black, Sapphire Blue, Ruby Red, Astro White
Models V1730DA, V1730DT M1901F71
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, 8, 40, 41
Speed HSPA 42.2/5.76 Mbps, LTE (2CA) Cat6 300/50 Mbps HSPA 42.2/5.76 Mbps, LTE (2CA) Cat12 600/150 Mbps
Technology GSM / CDMA / HSPA / LTE GSM / HSPA / LTE
  CDMA 800 & TD-SCDMA -
Platform
Chipset Qualcomm SDM636 Snapdragon 636 (14 nm) Qualcomm SDM660 Snapdragon 660 (14 nm)
CPU Octa-core (4x1.8 GHz Kryo 260 Gold & 4x1.6 GHz Kryo 260 Silver) Octa-core (4x2.2 GHz Kryo 260 Gold & 4x1.8 GHz Kryo 260 Silver)
GPU Adreno 509 Adreno 512
OS Android 8.1 (Oreo), Funtouch 4 Android 9.0 (Pie), planned upgrade to Android 10, MIUI 12
Selfie camera
Features - HDR
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