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Vivo Y51s vs Oppo A3x 128GB

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 / 1900 / 2100   HSDPA 850 / 900 / 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 162 x 76.6 x 8.5 mm   165.8 x 76.1 x 7.7 mm  
Sim Type Dual Sim, Dual Standby (Nano-SIM)   Dual Sim, Dual Standby (Nano-SIM)  
Weight 190 g   186 g  
Display Type IPS LCD Capacitive Touchscreen, 16M Colors, Multitouch   IPS LCD Capacitive Touchscreen, 16M Colors, Multitouch   90Hz, 1000 nits (HBM)  
Display Size 1080 x 2408 Pixels (~401 PPI)   6.67 Inches   720 x 1604 Pixels (~264 PPI)  
Protection Panda Glass  
Memory 128GB Built-in, 8GB RAM   128GB Built-in, 4GB RAM, eMMC 5.1  
Card slot microSD Card, (supports up to 1TB)   microSDXC  
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  
BlueTooth v5.0 with A2DP, LE   v5.0 with A2DP, LE  
USB USB Type-C port   USB Type-C 2.0, OTG  
NFC No   No  
GPS Yes + A-GPS support & Glonass, BDS, GALILEO   Yes + A-GPS support, & GLONASS, BDS, GALILEO  
Main Camera Geo-tagging, Phase detection, Panorama, HDR, Video ([email protected], [email protected]; gyro-EIS)   Dual Camera: 8 MP, f/2.0, (wide), PDAF + Auxiliary lens, LED Flash   HDR, panorama, Video (1080p@30/60fps)  
Front Camera 16 MP, f/2.0   5 MP, f/2.2, (wide), Video (1080p@30fps)  
OS Android 10.0 OS   Android 14 OS  
Chipset Snapdragon 662   Qualcomm Snapdragon 6s Gen 1  
Processor Octa-core (2 x 2.0 GHz Cortex-A77 + 6 x 1.8 GHz Cortex-A76)   Octa Core  
GPU Adreno 610   Adreno 610  
Sensors Accelerometer, Compass, Fingerprint (side mounted)), Proximity   Accelerometer, Compass, Fingerprint (side-mounted), Proximity  
Browser HTML5   HTML5  
Sound 3.5mm Audio Jack, MP4/H.264 player, MP3/WAV/eAAC+/FLAC player, Speaker Phone   3.5mm Audio Jack, Speaker Phone  
Colors Titanium Sapphire, Crystal Symphony   Nebula Red, Ocean Blue  
Battery - Fast battery charging 18W   (Non removable), 5100 mAh   - Fast battery 45W wired, PD2.0, PPS, 50% in 30 min (advertised)  
Misc Active noise cancellation with dedicated mic, Document viewer, Photo/video editor   SMS(threaded view), MMS, Email, Push Mail, IM   IP54, dust and splash resistant MIL-STD-810H compliant*, * does not guarantee ruggedness or use in extreme conditions, Document editor, Photo/video editor