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Vivo  V40 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 / 21   HSDPA 850 / 900 / 2100  
4G Network LTE   LTE band 1(2100), 3(1800), 4(1700/2100), 5(850), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500)  
5G Network 5G SA/NSA  
Dimensions 164.2 x 75 x 7.6 mm   163.7 x 75 x 8.2 mm  
Sim Type Dual Sim, Dual Standby (Nano-SIM)   Dual Sim, Dual Standby (Nano-SIM)  
Weight 190 g   188 g  
Display Type AMOLED Capacitive Touchscreen, Multitouch   HDR10+, 120Hz, 4500 nits (peak)   IPS LCD Capacitive Touchscreen, 16M Colors, Multitouch   90Hz, 720 nits (peak)  
Display Size 6.78 Inches   1260 x 2800 Pixels (~453 PPI)   6.56 Inches   720 x 1612 Pixels (~269 PPI)  
Protection Schott Xensation glass   Corning Gorilla Glass  
Memory 256GB Built-in, 12GB RAM, UFS 3.1   128GB Built-in, 4GB RAM (+4GB virtual RAM)  
Card slot No   microSDXC  
GPRS Yes
WLAN Wi-Fi 802.11 a/b/g/n/ac, dual-band   Wi-Fi 802.11 a/b/g/n/ac, dual-band  
BlueTooth v5.4 with A2DP, LE   v5.3 with A2DP, LE, aptX  
USB USB Type-C 2.0, OTG   USB Type-C 2.0, OTG  
NFC Yes   No  
GPS Yes + A-GPS Support & GLONASS, GALILEO, BDS, QZSS, NavIC   Yes + A-GPS support & Glonass, BDS, GALILEO  
Main Camera Dual Camera: 50 MP, f/1.9, 24mm (wide), 1/1.56", PDAF, OIS + 50 MP, f/2.0, 15mm, (ultrawide), 1/2.76", AF, Ring-LED flash   HDR, panorama, Video (4K@30fps, 1080p@30fps, gyro-EIS, OIS)   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 50 MP, f/2.0, 21mm (wide), 1/2.76", AF, HDR, Video (4K@30fps, 1080p@30fps)   5 MP, f/2.2, (wide), Panorama, Video (1080p@30fps)  
OS Android 14 OS   Android 13 OS  
Chipset Qualcomm SM7550-AB Snapdragon 7 Gen 3 (4 nm)   Mediatek MT6769 Helio G85 (12nm)  
Processor Octa-core (1 x 2.63 GHz Cortex-A715 + 3 x 2.4 GHz Cortex-A715 + 4 x 1.8 GHz Cortex-A510)   Octa-core (2 x 2.0 GHz Cortex-A75 + 6 x 1.8 GHz Cortex-A55)  
GPU Adreno 720   Arm Mali-G52  
Sensors Accelerometer, Compass, Fingerprint (under display, optical), Gyro, Proximity   Accelerometer, Compass, Fingerprint (side-mounted), Proximity  
Browser HTML5   HTML5  
Sound Speaker Phone   3.5mm Audio Jack, MP3/WAV/WMA/eAAC+/FLAC player, MP4/WMV/H.265 player, Speaker  Phone  
Colors Nebula Purple, Moonlight White   Glowing Black, Glowing Blue  
Battery (Li-ion Non removable), 5500 mAh   - Fast battery 80W wired, PD Reverse wired   (Li-Po Non removable), 5000 mAh  
Misc SMS(threaded view), MMS, Email, Push Mail, IM   NFC (market/region dependent), Glass front, plastic frame, glass back, IP68/IP69 dust/water resistant (up to 1.5m for 30 min), Document viewer, Photo/video editor   SMS(threaded view), MMS, Email, Push Mail, IM   IP54, dust and splash resistant, Photo/video editor, Document viewer