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Samsung Galaxy S3 I9300 vs Oppo A18 128GB

2G Network GSM 850 / 900 / 1800 / 1900 SIM1: GSM 850 / 900 / 1800 / 1900SIM2: GSM 850 / 900 / 1800 / 1900  
3G Network HSDPA 850 / 900 / 1900 / 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 136.6 x 70.6 x 8.6 mm 163.7 x 75 x 8.2 mm  
Sim Type Dual Sim, Dual Standby (Nano-SIM)  
Weight 133 g 188 g  
Display Type Super AMOLED capacitive touchscreen, 16M colors, TouchWiz UI v4.0 IPS LCD Capacitive Touchscreen, 16M Colors, Multitouch   90Hz, 720 nits (peak)  
Display Size 720 x 1280 pixels, 4.8 inches, Corning Gorilla Glass 2 6.56 Inches   720 x 1612 Pixels (~269 PPI)  
Multitouch Yes
Protection Corning Gorilla Glass  
Memory 16/32/64GB built-in 128GB Built-in, 4GB RAM (+4GB virtual RAM)  
Card slot microSD card (supports up to 64GB) microSDXC  
RAM 1GB RAM
GPRS Yes
WLAN WLAN (Wi-Fi 802.11 a/b/g/n Wi-Fi 802.11 a/b/g/n/ac, dual-band  
BlueTooth Bluetooth v4.0 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 8MP, 3264x2448 pixels, autofocus, LED flash, Simultaneous HD video & image recording, geo-tagging, touch focus, face and smile detection, image stabilization, Video (1080p 30fps), 2ndary (1.9 MP, 720p 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 5 MP, f/2.2, (wide), Panorama, Video (1080p@30fps)  
OS Android OS, v4.0.4 (Ice Cream Sandwich) Android 13 OS  
Chipset Qua, Exynos 4212 Quad Mediatek MT6769 Helio G85 (12nm)  
Processor Octa-core (2 x 2.0 GHz Cortex-A75 + 6 x 1.8 GHz Cortex-A55)  
GPU GPU Arm Mali-G52  
Sensors Accelerometer, gyro, RGB sensor, proximity, compass & barometer Accelerometer, Compass, Fingerprint (side-mounted), Proximity  
Browser HTML, Adobe Flash HTML5  
Sound Stereo FM radio with RDS, 3.5mm audio jack, MP4/DivX/XviD/WMV/H.264/H.263 player, MP3/WAV/eAAC+/AC3/FLAC player, Dropbox (50 GB storage), TV-out (via MHL A/V link), SNS integration, YouTube, Google Talk, Image/video editor, Games (built-in + downloadable) 3.5mm Audio Jack, MP3/WAV/WMA/eAAC+/FLAC player, MP4/WMV/H.265 player, Speaker  Phone  
Colors Blue, White Glowing Black, Glowing Blue  
Battery Stand-by Up to 590 h (Li-Po Non removable), 5000 mAh  
StandBy Time Stand-by Up to 590 h
Misc GPS + A-GPS support & GLONASS, MicroSIM card support only, S-Voice natural language commands & dictation, Active noise cancellation with dedicated mic, Smart Stay eye tracking, Document editor (Word, Excel, PowerPoint, PDF), Google Search, Maps, Gmail, Predictive text input (Swype), Speakerphone SMS(threaded view), MMS, Email, Push Mail, IM   IP54, dust and splash resistant, Photo/video editor, Document viewer