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Vivo Y55 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 / 1700(AWS) / 1900 / 2100   HSDPA 850 / 900 / 2100  
4G Network LTE band 1(2100), 3(1800), 7(2600), 8(900), 20(800)   LTE band 1(2100), 3(1800), 4(1700/2100), 5(850), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500)  
Dimensions 160.80 x 73.79 x 8.42mm   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 AMOLED Capacitive Touchscreen, Multitouch   IPS LCD Capacitive Touchscreen, 16M Colors, Multitouch   90Hz, 720 nits (peak)  
Display Size 6.44 Inches   1080 x 2400 Pixels (~409 PPI)   6.56 Inches   720 x 1612 Pixels (~269 PPI)  
Protection Corning Gorilla Glass  
Memory 128GB Built-in, 8GB RAM   128GB Built-in, 4GB RAM (+4GB virtual RAM)  
Card slot microSD Card, (supports up to 1TB)   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 v5.1 with A2DP, LE   v5.3 with A2DP, LE, aptX  
USB USB Type-C, USB On-The-Go   USB Type-C 2.0, OTG  
NFC Yes   No  
GPS Yes + A-GPS support, & GLONASS, BDS, GALILEO, QZSS   Yes + A-GPS support & Glonass, BDS, GALILEO  
Main Camera Triple Camera: 50 MP, f/1.8, 26mm (wide), PDAF + 2 MP, f/2.4, (macro) + 2 MP, f/2.4, (depth), Dual LED Flash   Night, Portrait, Photo, Double Exposure, Live Photo, Panorama, Slow Motion, Time-Lapse, Pro, Video   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 16 MP   5 MP, f/2.2, (wide), Panorama, Video (1080p@30fps)  
OS Android 12 OS   Android 13 OS  
Chipset Qualcomm Snapdragon 680 4G   Mediatek MT6769 Helio G85 (12nm)  
Processor Octa core (4 x 2.4 GHz Kryo 265 + 4 x 1.9 GHz Kryo 265)   Octa-core (2 x 2.0 GHz Cortex-A75 + 6 x 1.8 GHz Cortex-A55)  
GPU Adreno 610   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 Midnight Galaxy, Ice Dawn   Glowing Black, Glowing Blue  
Battery (Li-Po Non removable), 5000 mAh   - Fast charging 44W   (Li-Po Non removable), 5000 mAh  
Misc SMS(threaded view), MMS, Email, Push Mail, IM   Glass front, Plastic frame, Plastic back, 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