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Samsung Galaxy Y Duos S6312 vs Oppo A18 128GB

2G Network Sim 1: GSM 850 / 900 / 1800 / 1900 Sim 2: GSM 850 / 900 / 1800 / 1900 SIM1: GSM 850 / 900 / 1800 / 1900SIM2: GSM 850 / 900 / 1800 / 1900  
3G Network HSDPA 900 / 2100 HSDPA 850 / 900 / 2100  
4G Network LTE band 1(2100), 3(1800), 4(1700/2100), 5(850), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500)  
Dimensions N/A 163.7 x 75 x 8.2 mm  
Sim Type Dual Sim, Dual Standby (Nano-SIM)  
Weight N/A 188 g  
Display Type HVGA LCD, 256K colors, TouchWiz UI IPS LCD Capacitive Touchscreen, 16M Colors, Multitouch   90Hz, 720 nits (peak)  
Display Size 320 x 480 pixels, 3.27 inches (~127 ppi pixel density) 6.56 Inches   720 x 1612 Pixels (~269 PPI)  
Protection Corning Gorilla Glass  
Memory 4GB built-in 128GB Built-in, 4GB RAM (+4GB virtual RAM)  
Card slot microSD card(supports up to 64GB) microSDXC  
RAM 768 MB RAM
GPRS Yes
WLAN WLAN (Wi-Fi 802.11 b/g/n Wi-Fi 802.11 a/b/g/n/ac, dual-band  
BlueTooth Bluetooth v3.0 with A2DP v5.3 with A2DP, LE, aptX  
USB USB USB Type-C 2.0, OTG  
NFC No  
GPS Yes Yes + A-GPS support & Glonass, BDS, GALILEO  
Main Camera 3 MP, 2048 x 1536 pixels, Geo-tagging, Video (QVGA 24fps) 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 5 MP, f/2.2, (wide), Panorama, Video (1080p@30fps)  
OS Android 4.1, Jelly Bean Android 13 OS  
Chipset Mediatek MT6769 Helio G85 (12nm)  
Processor 1Ghz Octa-core (2 x 2.0 GHz Cortex-A75 + 6 x 1.8 GHz Cortex-A55)  
GPU Arm Mali-G52  
Sensors Accelerometer, proximity, compass Accelerometer, Compass, Fingerprint (side-mounted), Proximity  
Browser HTML (Adobe Flash) HTML5  
Sound Stereo FM radio with RDS, 3.5mm audio jack, MP4/WMV/H.264 player, MP3/WAV/eAAC+ player, YouTube, Google Talk, Image/video editor, SNS integration, Games (built-in + downloadable) 3.5mm Audio Jack, MP3/WAV/WMA/eAAC+/FLAC player, MP4/WMV/H.265 player, Speaker  Phone  
Colors Black Glowing Black, Glowing Blue  
Battery Stand-by Up to 360 h (Li-Po Non removable), 5000 mAh  
StandBy Time Stand-by Up to 360 h
Misc Dual SIM (dual stand-by), GPS + A-GPS support, Samsung hub service,Games hub, DropBox Cloud storage, Sync & backup, Quickoffice document viewer/editor, Google Search, Maps, Gmail, Calendar, Picasa integration, Organizer, Predictive text input (Swype) SMS(threaded view), MMS, Email, Push Mail, IM   IP54, dust and splash resistant, Photo/video editor, Document viewer