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Samsung Galaxy M31 vs Oppo Reno 15

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 800 / 850 / 900 / 1700(AWS) / 1900 / 2100  
4G Network LTE band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 20(800)   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 159.2 x 75.1 x 8.9 mm   158 x 74.8 x 7.77mm (Twilight Blue), 7.89mm (Aurora White)  
Sim Type Dual Sim, Dual Standby (Nano-SIM)   Nano-SIM + Nano-SIM + eSIM (max 2 at a time)  
Weight 191 g   197 g  
Display Type Super AMOLED Capacitive Touchscreen, 16M Colors, Multitouch   AMOLED Capacitive Touchscreen, 1B Colors   120Hz, HDR10+, 600 nits (typ), 1200 nits (HBM)  
Display Size 1080 x 2340 Pixels (~403 PPI)   6.59 Inches   1256 x 2760 Pixels (~460 PPI)  
Protection Corning Gorilla Glass 3   Corning Gorilla Glass 7i  
Memory 128GB Built-in, 6GB RAM   256GB Built-in, 12GB RAM, UFS 3.1  
Card slot microSDXC (dedicated slot)   No  
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 v5.0 with A2DP, LE   v5.4 with A2DP, LE, aptX HD, LHDC 5  
USB 2.0, Type-C 1.0 reversible connector   USB Type-C 2.0, OTG  
NFC Yes   Yes  
GPS Yes + A-GPS support & Glonass, BDS, GALILEO   Yes + GPS, GLONASS, GALILEO, BDS, QZSS  
Main Camera Phase detection, Geo-tagging, touch focus, face detection, panorama, HDR, Video ([email protected], [email protected], gyro-EIS)   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 32 MP, f/2.0, 26mm (wide), 1/2.8   50 MP, f/2.0, 18mm (ultrawide), AF, Panorama, HDR, Video (4K@30/60fps, 1080p@30/60fps, gyro-EIS, HDR)  
OS Android 10 OS   Android 16 OS  
Chipset Exynos 9611 (10nm)   Qualcomm SM7750-AB Snapdragon 7 Gen 4 (4 nm)  
Processor Octa-core (4 x 2.3 GHz Cortex-A73 + 4 x 1.7 GHz Cortex-A53)   Octa-core (1 x 2.8 GHz Cortex-720 + 4 x 2.4 GHz Cortex-720 + 3 x 1.8 GHz Cortex-520)  
GPU Mali-G72 MP3   Adreno 722  
Sensors Accelerometer, Compass, Fingerprint (rear mounted), Gyro, Proximity   Accelerometer, Compass, Fingerprint (under display, optical), Gyro, Proximity, BeaconLink calls via bluetooth, up to 200m  
Browser HTML5   HTML5  
Sound 3.5mm Audio Jack, MP3/WAV/WMA/eAAC+/FLAC player, MP4/WMV/H.265 player, Speaker Phone   Speaker Phone  
Colors Ocean Blue, Space Black, Red   Twilight Blue, Aurora White  
Battery - Fast battery charging 15W   6500 mAh   - Fast battery 80W wired, 80W UFCS, 55W PPS, 13.5W PD, 13.5W QC, 100% in 50 min, Reverse wired  
Misc Glass front + Gorilla Glass 3), Plastic back, Plastic frame, Active noise cancellation with dedicated mic, Photo/video editor, Document viewer   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)