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Samsung Galaxy S3 I9300 vs Oppo Reno 15

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 800 / 850 / 900 / 1700(AWS) / 1900 / 2100  
4G Network LTE band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 12(700), 17(700), 20(800), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500)  
5G Network SA/NSA  
Dimensions 136.6 x 70.6 x 8.6 mm 158 x 74.8 x 7.77mm (Twilight Blue), 7.89mm (Aurora White)  
Sim Type Nano-SIM + Nano-SIM + eSIM (max 2 at a time)  
Weight 133 g 197 g  
Display Type Super AMOLED capacitive touchscreen, 16M colors, TouchWiz UI v4.0 AMOLED Capacitive Touchscreen, 1B Colors   120Hz, HDR10+, 600 nits (typ), 1200 nits (HBM)  
Display Size 720 x 1280 pixels, 4.8 inches, Corning Gorilla Glass 2 6.59 Inches   1256 x 2760 Pixels (~460 PPI)  
Multitouch Yes
Protection Corning Gorilla Glass 7i  
Memory 16/32/64GB built-in 256GB Built-in, 12GB RAM, UFS 3.1  
Card slot microSD card (supports up to 64GB) No  
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 v5.4 with A2DP, LE, aptX HD, LHDC 5  
USB USB USB Type-C 2.0, OTG  
NFC Yes  
GPS Yes Yes + GPS, GLONASS, GALILEO, BDS, QZSS  
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) Triple Camera: 50 MP, f/1.8, 26mm (wide), PDAF, OIS + 50 MP, f/2.8, 80mm (telephoto), PDAF, OIS, 3.5x optical zoom + 8 MP, f/2.2, 15mm, (ultrawide), 1/4.0", AF, LED Flash   Color spectrum sensor, HDR, panorama, Video (4K@30/60fps, 1080p@30/60/120fps, gyro-EIS, HDR)  
Front Camera 50 MP, f/2.0, 18mm (ultrawide), AF, Panorama, HDR, Video (4K@30/60fps, 1080p@30/60fps, gyro-EIS, HDR)  
OS Android OS, v4.0.4 (Ice Cream Sandwich) Android 16 OS  
Chipset Qua, Exynos 4212 Quad Qualcomm SM7750-AB Snapdragon 7 Gen 4 (4 nm)  
Processor Octa-core (1 x 2.8 GHz Cortex-720 + 4 x 2.4 GHz Cortex-720 + 3 x 1.8 GHz Cortex-520)  
GPU GPU Adreno 722  
Sensors Accelerometer, gyro, RGB sensor, proximity, compass & barometer Accelerometer, Compass, Fingerprint (under display, optical), Gyro, Proximity, BeaconLink calls via bluetooth, up to 200m  
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) Speaker Phone  
Colors Blue, White Twilight Blue, Aurora White  
Battery Stand-by Up to 590 h 6500 mAh   - Fast battery 80W wired, 80W UFCS, 55W PPS, 13.5W PD, 13.5W QC, 100% in 50 min, Reverse wired  
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   NFC (market/region dependent), Glass front + Gorilla Glass 7i), aluminum frame, glass back, IP68/IP69 dust tight and water resistant (high pressure water jets; immersible up to 1.5m for 30 min)