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Vivo Y21 vs Oppo A3x

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), 5(850), 8(900), 28(700), 38(2600), 40(2300), 41(2500) LTE band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500)  
Dimensions 164.3 x 76.1 x 8 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 182 g 186 g  
Display Type LCD capacitive Touchscreen, 16M Colors, Multitouch IPS LCD Capacitive Touchscreen, 16M Colors, Multitouch   90Hz, 1000 nits (HBM)  
Display Size 6.51 Inches , 720 x 1600 Pixels (~270 PPI) 6.67 Inches   720 x 1604 Pixels (~264 PPI)  
Protection Panda Glass  
Memory 64/128GB Built-in, 4GB RAM (+1GB extended RAM) 64GB Built-in, 4GB RAM, UFS 2.2  
Card slot microSD Card, (supports up to 512GB) 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, USB On-The-Go USB Type-C 2.0, OTG  
NFC No No  
GPS Yes + AGPS, GLONASS, BDS, GALILEO Yes + A-GPS support, & GLONASS, BDS, GALILEO  
Main Camera Dual Camera: 13 MP, f/2.2, (wide), PDAF + 2 MP, f/2.4, (macro), LED Flash, Geo-tagging, Phase detection, Panorama, HDR, Video ([email protected]) Dual Camera: 8 MP, f/2.0, (wide), PDAF + Auxiliary lens, LED Flash   HDR, panorama, Video (1080p@30/60fps)  
Front Camera 8 MP, f/2.0, (wide), Video ([email protected]) 5 MP, f/2.2, (wide), Video (1080p@30fps)  
OS Android 11 OS Android 14 OS  
Chipset Mediatek MT6765 Helio P35 (12nm) Qualcomm Snapdragon 6s Gen 1  
Processor Octa-core (4 x 2.35 GHz Cortex-A53 + 4 x 1.8 GHz Cortex-A53) Octa-Core  
GPU PowerVR GE8320 Adreno 610  
Sensors Accelerometer, Compass, Fingerprint (side mounted), Gyro, 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 Diamond Glow, Midnight Blue Nebula Red, Ocean Blue  
Battery (Li-Po Non removable), 5000 mAh - Fast charging 18W 0% to 34% in 30 minutes (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