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Vivo   Y28 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 165.7 x 76 x 8 mm   163.7 x 75 x 8.2 mm  
Sim Type Dual Sim, Hybrid Dual SIM (Nano-SIM)   Dual Sim, Dual Standby (Nano-SIM)  
Weight 199 g   188 g  
Display Type IPS LCD Capacitive Touchscreen, 16M Colors, Multitouch   90Hz, 760 nits (typ), 1000 nits (HBM)   IPS LCD Capacitive Touchscreen, 16M Colors, Multitouch   90Hz, 720 nits (peak)  
Display Size 6.7 Inches   720 x 1608 Pixels (~264 PPI)   6.56 Inches   720 x 1612 Pixels (~269 PPI)  
Protection Corning Gorilla Glass  
Memory 128GB Built-in, 8GB RAM (+8GB Extended RAM), UFS 2.2   128GB Built-in, 4GB RAM (+4GB virtual RAM)  
Card slot microSDXC (uses shared SIM slot)   microSDXC  
GPRS Yes
WLAN Wi-Fi 802.11 a/b/g/n, dual-band   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 2.0, OTG   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: 50 MP, f/1.8, (wide), PDAF + 2 MP, f/2.4, (depth), LED Flash   Geo-tagging, Phase detection, Panorama, HDR, Video (1080p@30fps)   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/2.1, (wide), Video (1080p@30fps)   5 MP, f/2.2, (wide), Panorama, Video (1080p@30fps)  
OS Android 14 OS   Android 13 OS  
Chipset MediaTek Helio G85 SoC   Mediatek MT6769 Helio G85 (12nm)  
Processor Octa-core (2 x 2.0 GHz Cortex-A75 + 6 x 1.8 GHz Cortex-A55)   Octa-core (2 x 2.0 GHz Cortex-A75 + 6 x 1.8 GHz Cortex-A55)  
GPU Mali G57 MP2   Arm Mali-G52  
Sensors Accelerometer, Compass, Fingerprint (side-mounted), Proximity   Accelerometer, Compass, Fingerprint (side-mounted), Proximity  
Browser HTML5   HTML5  
Sound 3.5mm Audio Jack, 24-bit/192kHz Hi-Res audio, Speaker Phone   3.5mm Audio Jack, MP3/WAV/WMA/eAAC+/FLAC player, MP4/WMV/H.265 player, Speaker  Phone  
Colors Agate Green, Gleaming Orange   Glowing Black, Glowing Blue  
Battery (Non removable), 6000 mAh   - Fast battery 44W wired   (Li-Po Non removable), 5000 mAh  
Misc SMS(threaded view), MMS, Email, Push Mail, IM   Notification LED round light on the back, Glass front, plastic frame, plastic back, IP64 dust/water resistant, Document viewer, Photo/video editor   SMS(threaded view), MMS, Email, Push Mail, IM   IP54, dust and splash resistant, Photo/video editor, Document viewer