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Vivo Y31 vs Xiaomi Redmi A5

2G Network SIM1: GSM 850 / 900 / 1800 / 1900SIM2: GSM 850 / 900 / 1800 / 1900   SIM1: GSM 850 / 900 / 1800 / 1900SIM2: GSM 850 / 900 / 1800 / 1900  
3G Network HSDPA 850 / 900 / 2100   HSDPA 850 / 900 / 2100  
4G Network LTE band 1(2100), 3(1800), 7(2600), 8(900), 20(800)   LTE band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 38(2600), 39(1900), 40(2300), 41(2500)  
Dimensions 163.9 x 75.3 x 8.4 mm   171.7 x 77.8 x 8.3 mm  
Sim Type Dual Sim, Dual Standby (Nano-SIM)   Nano-SIM + Nano-SIM  
Weight 188 g   193 g  
Display Type (~84.5% screen-to-body ratio)   IPS LCD Capacitive Touchscreen   120Hz, 450 nits (typ)  
Display Size 1080 x 2408 Pixels (~401 PPI)   6.88 Inches   720 x 1640 Pixels (~260 PPI)  
Memory 128GB Built-in, 4GB RAM   64GB Built-in, 4GB RAM, eMMC 5.1  
Card slot microSDXC (dedicated slot)   microSDXC (dedicated slot)  
GPRS Yes
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  
BlueTooth v5.0 with A2DP, LE   v5.2 with A2DP, LE  
USB USB Type-C 2.0, USB On-The-Go   USB Type-C 2.0  
NFC No   No  
GPS Yes + AGPS, GLONASS, BDS, GALILEO   Yes + GPS  
Main Camera Night, Portrait, Pano, Live Photo, Slo-Mo, Time-Lapse, Pro, DOC, AI Panorama, HDR, Video   Dual Camera: 32 MP, f/1.8, (wide) + Auxiliary lens, LED Flash   HDR, Video (1080p@30fps)  
Front Camera 8 MP   8 MP, f/2.0, (wide), Video (1080p@30fps)  
OS Android 11 OS   Android 15 (Go edition), up to 2 major Android upgrades  
Chipset Qualcomm SM6115 Snapdragon 662 (11 nm)   Unisoc T7250 (12 nm)  
Processor Octa-core (4 x 2.0 GHz Kryo 260 Gold + 4 x 1.8 GHz Kryo 260 Silver)   Octa-core (2x 1.8 GHz Cortex-A75 + 6 x 1.6 GHz Cortex-A55)  
GPU Adreno 610   Mali-G57 MP1  
Sensors Accelerometer, Compass, Fingerprint (side mounted), Gyro, Proximity   Accelerometer, Compass, Fingerprint (side mounted), Virtual proximity sensing  
Browser HTML5   HTML5  
Sound 3.5mm Audio Jack, MP4/H.264 player, MP3/WAV/eAAC+/FLAC player, Speaker Phone   3.5mm Audio Jack, 24-bit/192kHz audio, Speaker  Phone  Mobile phone accessories
Colors Racing Black, Ocean Blue   Ocean Blue, Lake Green, Sandy Gold, Midnight Black  
Battery - Fast charging 18W, 70% in 67 min (advertised)   (Non removable), 5200 mAh   - Battery charging 15W  
Misc Glass front + Plastic back, Plastic frame, Active noise cancellation with dedicated mic, Document viewer, Photo/video editor   SMS(threaded view), MMS, Email, Push Mail, IM   Dust and splash resistant, Photo/video editor, Document viewer