Product
Xiaomi Mi A2 (Mi 6X)
Xiaomi Mi A2 (Mi 6X)
Vivo V17
Vivo V17
Battery
Charging 18W wired, QC3 (Global) 18W wired, QC4 (India) 18W wired
Type Li-Po 3000 mAh, non-removable 4500 mAh, non-removable
Body
Build Glass front, aluminum back, aluminum frame Glass front, plastic back, plastic frame
Dimensions 158.7 x 75.4 x 7.3 mm (6.25 x 2.97 x 0.29 in) 159 x 74.2 x 8.5 mm (6.26 x 2.92 x 0.33 in)
SIM Nano-SIM + Nano-SIM Nano-SIMNano-SIM + Nano-SIM
Weight 166 g (5.86 oz) 176 g (6.21 oz)
Comms
Bluetooth 5.0, A2DP, LE 5.0, A2DP, LE
Infrared port Yes -
NFC No No
Positioning GPS, GLONASS, BDS GPS, GLONASS, GALILEO, BDS
Radio No No
USB USB Type-C 2.0 USB Type-C 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/ac, dual-band, Wi-Fi Direct
Display
Resolution 1080 x 2160 pixels, 18:9 ratio (~403 ppi density) 1080 x 2400 pixels, 20:9 ratio (~409 ppi density)
Size 5.99 inches, 92.6 cm2 (~77.4% screen-to-body ratio) 6.44 inches, 100.1 cm2 (~84.9% screen-to-body ratio)
Type IPS LCD Super AMOLED
Features
Sensors Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass Fingerprint (under display, optical), accelerometer, gyro, proximity, compass
Launch
Announced 2018, July 24. Released 2018, July 2019, November 23. Released 2019, December
Status Discontinued Discontinued
Main Camera
Dual 12 MP, f/1.8, 1/2.9", 1.25µm 20 MP, f/1.8, 1/2.8", 1.0µm, PDAF -
Features Dual-LED flash, HDR, panorama LED flash, HDR, panorama
Quad - 48 MP, f/1.8, (wide), 1/2.0", 0.8µm, PDAF 8 MP, f/2.2, 13mm (ultrawide), 1/4.0", 1.12µm 2 MP, f/2.4, (macro) 2 MP, f/2.4, (depth)
Video 4K@30fps, 1080p@30fps (gyro-EIS), 720p@120fps 4K@30fps, 1080p@30/60fps
Memory
Card slot No microSDXC (dedicated slot)
Internal 32GB 4GB RAM, 64GB 4GB RAM, 128GB 6GB RAM 128GB 8GB RAM, 256GB 8GB RAM
  eMMC 5.1 UFS 2.1
Misc
Colors Black, Gold, Blue, Red, Rose Gold Admiral Blue, Glacier Ice White, Midnight Ocean Black
Models M1804D2SG, M1804D2SI, Mi A2, Mi 6X 1919
SAR 0.96 W/kg (head)     0.64 W/kg (body)     0.99 W/kg (head)     0.25 W/kg (body)    
SAR EU 1.16 W/kg (head)     0.66 W/kg (body)     -
Network
2G bands GSM 850 / 900 / 1800 / 1900 GSM 850 / 900 / 1800 / 1900
3G bands HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 - Global HSDPA 850 / 900 / 2100
4G bands 1, 2, 3, 4, 5, 7, 8, 20, 38, 40 - Global 1, 3, 5, 8, 38, 40, 41
Speed HSPA 42.2/5.76 Mbps, LTE (3CA) Cat12 600/150 Mbps HSPA, LTE
Technology GSM / CDMA / HSPA / LTE GSM / HSPA / LTE
  1, 3, 5, 7, 8, 34, 38, 39, 40, 41 - China 1, 3, 5, 7, 8, 38, 40, 41
Our Tests
Battery (old) Endurance rating 73h -
Camera Photo / Video -
Loudspeaker Voice 89dB / Noise 72dB / Ring 89dB -
Performance AnTuTu: 130927 (v7), 172886 (v8) GeekBench: 4625 (v4.4), 1157 (v5.1) GFXBench: 8.6fps (ES 3.1 onscreen) -
Platform
Chipset Qualcomm SDM660 Snapdragon 660 (14 nm) Qualcomm SDM675 Snapdragon 675 (11 nm)
CPU Octa-core (4x2.2 GHz Kryo 260 Gold & 4x1.8 GHz Kryo 260 Silver) Octa-core (2x2.0 GHz Kryo 460 Gold & 6x1.7 GHz Kryo 460 Silver)
GPU Adreno 512 Adreno 612
OS Android 8.1 (Oreo), upgradable to Android 9.0 (Pie), Android One Android 9.0 (Pie), Funtouch 9.2
Selfie camera
Features LED flash, HDR HDR
Single 20 MP, f/2.2, (wide), 1/3", 0.9µm 32 MP, f/2.5, 23mm (wide), 1/2.8", 0.8µm
Video 1080p@30fps 1080p@30fps
Sound
3.5mm jack No Yes
Loudspeaker Yes Yes