Product
Vivo V7
Vivo V7
Xiaomi Redmi K20 Pro
Xiaomi Redmi K20 Pro
Battery
Charging - 27W wired, QC4
Type Li-Ion 3000 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), aluminum frame
Dimensions 149.3 x 72.8 x 7.9 mm (5.88 x 2.87 x 0.31 in) 156.7 x 74.3 x 8.8 mm (6.17 x 2.93 x 0.35 in)
SIM Nano-SIM + Nano-SIM Nano-SIM + Nano-SIM
Weight 139 g (4.90 oz) 191 g (6.74 oz)
Comms
Bluetooth 4.2, A2DP, LE 5.0, A2DP, LE, aptX HD
NFC No Yes (China only)
Positioning GPS, GLONASS, BDS GPS (L1+L5), GLONASS (G1), BDS (B1), GALILEO (E1+E5a)
Radio FM radio, recording Yes
USB microUSB 2.0, OTG USB Type-C 2.0, OTG
WLAN Wi-Fi 802.11 b/g/n, Wi-Fi Direct, DLNA Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct
Display
Protection - Corning Gorilla Glass 5
Resolution 720 x 1440 pixels, 18:9 ratio (~282 ppi density) 1080 x 2340 pixels, 19.5:9 ratio (~403 ppi density)
Size 5.7 inches, 83.8 cm2 (~77.1% screen-to-body ratio) 6.39 inches, 100.2 cm2 (~86.1% screen-to-body ratio)
Type IPS LCD Super AMOLED, HDR10
Features
Sensors Fingerprint (rear-mounted), accelerometer, proximity, compass Fingerprint (under display, optical), accelerometer, gyro, proximity, compass
Launch
Announced 2017, November. Released 2017, December 2019, May 28. Released 2019, June 01
Status Discontinued Discontinued
Main Camera
Features LED flash, HDR Laser AF, Dual-LED flash, HDR, panorama
Single 16 MP, f/2.0, 1/3.0", 1.0µm, PDAF -
Triple - 48 MP, f/1.8, 26mm (wide), 1/2.0", 0.8µm, PDAF 8 MP, f/2.4, 53mm (telephoto), 1/4.0", 1.12µm, PDAF, 2x optical zoom 13 MP, f/2.4, 12mm (ultrawide), 1/3.1", 1.12µm
Video 1080p@30fps 4K@30/60fps, 1080p@30/120/240fps, 1080p@960fps
Memory
Card slot microSDXC (dedicated slot) No
Internal 32GB 4GB RAM 64GB 6GB RAM, 128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAM
  eMMC 5.1 UFS 2.1
Misc
Colors Champagne Gold, Matte Black, Energetic Blue Carbon black, Flame red, Glacier blue, Summer Honey, Pearl White
Models 1718 M1903F11I
SAR 0.94 W/kg (head)     0.67 W/kg (body)     1.03 W/kg (head)     0.72 W/kg (body)    
Network
2G bands GSM 900 / 1800 - SIM 1 & SIM 2 GSM 850 / 900 / 1800 / 1900
3G bands HSDPA 850 / 900 / 2100 HSDPA 850 / 900 / 1900 / 2100
4G bands 1, 3, 5, 7, 8, 40, 41 1, 3, 5, 7, 8, 34, 38, 39, 40, 41
Speed HSPA, LTE HSPA, LTE
Technology GSM / HSPA / LTE GSM / HSPA / LTE
  1, 3, 5, 8, 38, 40, 41 - India -
Our Tests
Audio quality Noise -93.5dB / Crosstalk -83.1dB Noise -93.9dB / Crosstalk -94.2dB
Battery (old) Endurance rating 77h Endurance rating 103h
Camera Photo / Video Photo / Video
Display Contrast ratio: 1593:1 (nominal), 2.404 (sunlight) 643 nits max brightness (measured)
Loudspeaker Voice 65dB / Noise 73dB / Ring 83dB Voice 71dB / Noise 75dB / Ring 84dB
Performance AnTuTu: 71167 (v7) GeekBench: 3935 (v4.4) GFXBench: 6.6fps (ES 3.1 onscreen) AnTuTu: 368846 (v7), 437823 (v8) GeekBench: 10684 (v4.4), 2732 (v5.1) GFXBench: 36fps (ES 3.1 onscreen)
Platform
Chipset Qualcomm SDM450 Snapdragon 450 (14 nm) Qualcomm SM8150 Snapdragon 855 (7 nm)
CPU Octa-core 1.8 GHz Cortex-A53 Octa-core (1x2.84 GHz Kryo 485 & 3x2.42 GHz Kryo 485 & 4x1.78 GHz Kryo 485)
GPU Adreno 506 Adreno 640
OS Android 7.1.2 (Nougat), Funtouch 3.2 Android 9.0 (Pie), upgradable to Android 10, MIUI 12
Selfie camera
Features - HDR
Single 24 MP, f/2.0, 26mm (wide), 1/2.8", 0.9µm Motorized pop-up 20 MP, f/2.2, (wide), 1/3.4", 0.8µm
Video 1080p@30fps 1080p@30fps
Sound
3.5mm jack Yes Yes
Loudspeaker Yes Yes
  - 24-bit/192kHz Hi-Res audio