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Vivo Y51 vs Xiaomi Redmi Note 8

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 / 1900 / 2100  
4G Network LTE band 1(2100), 5(850), 8(900), 40(2300)   LTE band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500)  
Dimensions 159.25 x 75.19 x 8.68 mm   158.3 x 75.3 x 8.4 mm  
Sim Type Hybrid Dual SIM, Dual Standby, (Nano-SIM)   Dual Sim, Dual Standby (Nano-SIM)  
Weight 186 g   190 g  
Display Type Super AMOLED Capacitive Touchscreen, 16M Colors, Multitouch   IPS LCD Capacitive Touchscreen, 16M Colors, Multitouch  
Display Size 1080 x 2340 Pixels (~403 PPI)   1080 x 2340 Pixels (~409 PPI)  
Memory 128GB Built-in, 4GB RAM   64GB Built-in, 4GB RAM  
Card slot microSDXC (dedicated slot)   microSD Card, (supports up to 256GB) (uses SIM 2 slot)  
GPRS Yes 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, Wi-Fi Direct, hotspot  
BlueTooth v5.0 with A2DP   v5.0 with A2DP, LE  
USB USB Type-C 2.0, USB On-The-Go   2.0, Type-C 1.0 reversible connector, USB On-The-Go  
NFC No   No  
GPS Yes + A-GPS support & Glonass, BDS, GALILEO   Yes + A-GPS support & Glonass, BDS  
Main Camera Geo-tagging, Phase detection, Panorama, HDR, Video ([email protected], [email protected]; gyro-EIS)   Geo-tagging, Phase detection, touch focus, HDR, Panorama, Video ([email protected], [email protected]/60/120fps, [email protected], gyro-EIS)  
Front Camera 16 MP, f/2.0, (wide), 1/3.06   13 MP, HDR, panorama, Video ([email protected])  
OS Android 10 OS   Android 9.0 (Pie)  
Chipset Qualcomm SDM665 Snapdragon 665 (11 nm)   Qualcomm SDM665 Snapdragon 665 (11 nm)  
Processor Octa-core (4 x 2.0 GHz Kryo 260 Gold + 4 x 1.8 GHz Kryo 260 Silver)   Octa-core (4 x 2.0 GHz Kryo 260 Gold + 4 x 1.8 GHz Kryo 260 Silver)  
GPU Adreno 610   Adreno 610  
Sensors Accelerometer, Compass, Fingerprint (under display, optical), Gyro, Proximity   Accelerometer, Compass, Fingerprint (rear mounted), Gyro, Proximity  
Browser HTML5   HTML5  
Sound 3.5mm Audio Jack, MP4/H.264 player, MP3/WAV/eAAC+/FLAC player, Speaker Phone   3.5mm Audio Jack, XviD/MP4/H.264 player, MP3/WAV/eAAC+/FLAC player, Speaker Phone  
Colors Mystic Black, Jazzy Blue, Dreamy White   Crystal Green, Crystal Blue  
Battery - Fast battery charging 18W   - Fast battery charging 18W  
Misc Active noise cancellation with dedicated mic, Document viewer, Photo/video editor   Active noise cancellation with dedicated mic, Photo/video editor, Document viewer