Product
Xiaomi Mi 4i
Xiaomi Mi 4i
Vivo Z1Pro
Vivo Z1Pro
Battery
Charging 10W wired, QC1 18W wired
Talk time Up to 35 h (3G) -
Type Li-Ion 3120 mAh, non-removable 5000 mAh, non-removable
Body
Build Glass front (Gorilla Glass), plastic back, plastic frame Glass front, plastic back, plastic frame
Dimensions 138.1 x 69.6 x 7.8 mm (5.44 x 2.74 x 0.31 in) 162.4 x 77.3 x 8.9 mm (6.39 x 3.04 x 0.35 in)
SIM Dual SIM (Micro-SIM, dual stand-by) Nano-SIM + Nano-SIM
Weight 130 g (4.59 oz) 201 g (7.09 oz)
Comms
Bluetooth 4.1, A2DP 5.0, A2DP, LE
NFC No No
Positioning GPS, GLONASS, BDS GPS, GLONASS, BDS
Radio Stereo 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, hotspot Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct
Display
Protection Corning scratch-resistant glass -
Resolution 1080 x 1920 pixels, 16:9 ratio (~441 ppi density) 1080 x 2340 pixels, 19.5:9 ratio (~395 ppi density)
Size 5.0 inches, 68.9 cm2 (~71.7% screen-to-body ratio) 6.53 inches, 104.7 cm2 (~83.4% screen-to-body ratio)
Type IPS LCD IPS LCD
Features
Sensors Accelerometer, gyro, proximity, compass Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass
Launch
Announced 2015, April. Released 2015, April 2019, July. Released 2019, July
Status Discontinued Discontinued
Main Camera
Features Dual-LED dual-tone flash, panorama, HDR LED flash, HDR, panorama
Single 13 MP, f/2.0, AF -
Triple - 16 MP, f/1.8, (wide), 1/2.8", 1.12µm, AF 8 MP, f/2.2, 16mm (ultrawide), 1/4.0", 1.12µm 2 MP, f/2.4, (depth)
Video 1080p@30fps, 480p@120fps 4K@30fps, 1080p@30/60fps
Memory
Card slot No microSDXC (dedicated slot)
Internal 16GB 2GB RAM, 32GB 2GB RAM 64GB 4GB RAM, 64GB 6GB RAM, 128GB 6GB RAM, 128GB 8GB RAM
  eMMC 4.5 UFS 2.1
Misc
Colors Dark Gray, Black, White, Yellow, Blue, Pink Sonic Blue, Sonic Black, Mirror Black
Models 2015015 1951, PD1911F_EX, 1918
SAR 0.51 W/kg (head)     0.60 W/kg (body)     0.75 W/kg (head)     0.40 W/kg (body)    
Network
2G bands GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 GSM 850 / 900 / 1800 / 1900
3G bands HSDPA 850 / 1900 / 2100 HSDPA 850 / 900 / 2100
4G bands 3, 7, 38, 39, 40, 41 1, 3, 4, 5, 8, 34, 38, 39, 40, 41
Speed HSPA, LTE Cat4 150/50 Mbps HSPA, LTE
Technology GSM / HSPA / LTE GSM / CDMA / HSPA / LTE
  TD-SCDMA CDMA 800 & TD-SCDMA
Our Tests
Battery (old) Endurance rating 67h -
Camera Photo / Video -
Display Contrast ratio: 1055:1 (nominal), 2.641 (sunlight) -
Loudspeaker Voice 63dB / Noise 65dB / Ring 68dB -
Performance Basemark X: 4875 AnTuTu: 184517 (v7) GeekBench: 6001 (v4.4) GFXBench: 13fps (ES 3.1 onscreen)
Platform
Chipset Qualcomm MSM8939 Snapdragon 615 (28 nm) Qualcomm SDM712 Snapdragon 712 (10 nm)
CPU Octa-core (4x1.7 GHz Cortex-A53 & 4x1.0 GHz Cortex-A53) Octa-core (2x2.3 GHz Kryo 360 Gold & 6x1.7 GHz Kryo 360 Silver)
GPU Adreno 405 Adreno 616
OS Android 5.0.2 (Lollipop), MIUI 8.2 Android 9.0 (Pie), upgradable to Android 10, Funtouch 10
Selfie camera
Features - HDR
Single 5 MP, f/1.8 32 MP, f/2.0, 26mm (wide), 1/2.8", 0.8µm
Video 1080p@60fps
Sound
3.5mm jack Yes Yes
Loudspeaker Yes Yes