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Vivo Y21 vs Oppo A18 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 / 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), 4(1700/2100), 5(850), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500)  
Dimensions 164.3 x 76.1 x 8 mm 163.7 x 75 x 8.2 mm  
Sim Type Dual Sim, Dual Standby (Nano-SIM) Dual Sim, Dual Standby (Nano-SIM)  
Weight 182 g 188 g  
Display Type LCD capacitive Touchscreen, 16M Colors, Multitouch IPS LCD Capacitive Touchscreen, 16M Colors, Multitouch   90Hz, 720 nits (peak)  
Display Size 6.51 Inches , 720 x 1600 Pixels (~270 PPI) 6.56 Inches   720 x 1612 Pixels (~269 PPI)  
Protection Corning Gorilla Glass  
Memory 64/128GB Built-in, 4GB RAM (+1GB extended RAM) 128GB Built-in, 4GB RAM (+4GB virtual RAM)  
Card slot microSD Card, (supports up to 512GB) microSDXC  
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 v5.3 with A2DP, LE, aptX  
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), AF + 2 MP, f/2.4, (depth, LED Flash   Geo-tagging, touch focus, face detection, panorama, HDR, Video (1080p@30fps)  
Front Camera 8 MP, f/2.0, (wide), Video ([email protected]) 5 MP, f/2.2, (wide), Panorama, Video (1080p@30fps)  
OS Android 11 OS Android 13 OS  
Chipset Mediatek MT6765 Helio P35 (12nm) Mediatek MT6769 Helio G85 (12nm)  
Processor Octa-core (4 x 2.35 GHz Cortex-A53 + 4 x 1.8 GHz Cortex-A53) Octa-core (2 x 2.0 GHz Cortex-A75 + 6 x 1.8 GHz Cortex-A55)  
GPU PowerVR GE8320 Arm Mali-G52  
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, MP3/WAV/WMA/eAAC+/FLAC player, MP4/WMV/H.265 player, Speaker  Phone  
Colors Diamond Glow, Midnight Blue Glowing Black, Glowing Blue  
Battery (Li-Po Non removable), 5000 mAh - Fast charging 18W 0% to 34% in 30 minutes (Li-Po Non removable), 5000 mAh  
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, Photo/video editor, Document viewer