Product
Xiaomi Mi A2 (Mi 6X)
Xiaomi Mi A2 (Mi 6X)
Vivo Y400 Pro
Vivo Y400 Pro
Battery
Charging 18W wired, QC3 (Global) 18W wired, QC4 (India) 90W wired, 50% in 19 min 6W reverse wired
Type Li-Po 3000 mAh, non-removable Li-Ion 5500 mAh
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) 163.8 x 75.0 x 7.5 or 7.7 mm
SIM Nano-SIM + Nano-SIM Nano-SIM + Nano-SIM
Weight 166 g (5.86 oz) 182 g (6.42 oz)
  - IP65 dust tight and water resistant (low pressure water jets)
Comms
Bluetooth 5.0, A2DP, LE 5.4, A2DP, LE
Infrared port Yes Yes
NFC No No
Positioning GPS, GLONASS, BDS GPS, GLONASS, GALILEO, BDS, QZSS
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
Display
Resolution 1080 x 2160 pixels, 18:9 ratio (~403 ppi density) 1080 x 2392 pixels (~388 ppi density)
Size 5.99 inches, 92.6 cm2 (~77.4% screen-to-body ratio) 6.77 inches, 110.9 cm2 (~90.3% screen-to-body ratio)
Type IPS LCD AMOLED, 120Hz, HDR, 1300 nits (HBM), 4500 nits (peak)
Features
Sensors Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass Fingerprint (under display, optical), accelerometer, gyro, proximity, compass
  - Circle to Search
Launch
Announced 2018, July 24. Released 2018, July 2025, June 20
Status Discontinued Available. Released 2025, June 27
Main Camera
Dual 12 MP, f/1.8, 1/2.9", 1.25µm 20 MP, f/1.8, 1/2.8", 1.0µm, PDAF 50 MP, f/1.8, (wide), 1/1.95", 0.8µm, PDAF 2 MP, f/2.4, (depth)
Features Dual-LED flash, HDR, panorama Ring-LED flash, panorama, HDR
Video 4K@30fps, 1080p@30fps (gyro-EIS), 720p@120fps 4K@30fps, 1080p@30fps, gyro-EIS
Memory
Card slot No No
Internal 32GB 4GB RAM, 64GB 4GB RAM, 128GB 6GB RAM 128GB 8GB RAM, 256GB 8GB RAM
  eMMC 5.1 UFS 3.1
Misc
Colors Black, Gold, Blue, Red, Rose Gold Fest Gold, Freestyle White, Nebula Purple
Models M1804D2SG, M1804D2SI, Mi A2, Mi 6X -
SAR 0.96 W/kg (head)     0.64 W/kg (body)     0.90 W/kg (head)    
SAR EU 1.16 W/kg (head)     0.66 W/kg (body)     0.85 W/kg (head)    
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, 28, 38, 40, 41
5G bands - 1, 3, 5, 8, 28, 38, 40, 41, 77, 78 SA/NSA
Speed HSPA 42.2/5.76 Mbps, LTE (3CA) Cat12 600/150 Mbps HSPA, LTE, 5G
Technology GSM / CDMA / HSPA / LTE GSM / HSPA / LTE / 5G
  1, 3, 5, 7, 8, 34, 38, 39, 40, 41 - China -
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) Mediatek Dimensity 7300 (4 nm)
CPU Octa-core (4x2.2 GHz Kryo 260 Gold & 4x1.8 GHz Kryo 260 Silver) Octa-core (4x2.5 GHz Cortex-A78 & 4x2.0 GHz Cortex-A55)
GPU Adreno 512 Mali-G615 MC2
OS Android 8.1 (Oreo), upgradable to Android 9.0 (Pie), Android One Android 15, Funtouch 15
Selfie camera
Features LED flash, HDR -
Single 20 MP, f/2.2, (wide), 1/3", 0.9µm 32 MP, f/2.5, (wide)
Video 1080p@30fps 4K@30fps, 1080p@30fps
Sound
3.5mm jack No No
Loudspeaker Yes Yes, with stereo speakers
  - 24-bit/192kHz Hi-Res & Hi-Res wireless audio