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Samsung Galaxy A51 8GB 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 / 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), 38(2600), 40(2300), 41(2500)   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 158.4 x 73.7 x 7.9 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 172 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 2400 Pixels (~405 PPI)   6.59 Inches   1256 x 2760 Pixels (~460 PPI)  
Protection Corning Gorilla Glass 3   Corning Gorilla Glass 7i  
Memory 128GB Built-in, 8GB RAM   256GB Built-in, 12GB RAM, UFS 3.1  
Card slot microSD card (supports up to 1TB) (dedicated slot)   No  
GPRS Yes
EDGE Yes
WLAN Wi-Fi 802.11 a/b/g/n/ac, dual-band, WiFi 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 Geo-tagging, touch focus, face detection, panorama, HDR, Video ([email protected])   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/2.2, 25mm (wide), 1/2.8", HDR, Video ([email protected])   50 MP, f/2.0, 18mm (ultrawide), AF, Panorama, HDR, Video (4K@30/60fps, 1080p@30/60fps, gyro-EIS, HDR)  
OS Android 10.0 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, gyro, proximity, compass, Fingerprint (under display, optical)   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 Prism, Crush Black, White, Blue, Pink   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 Active noise cancellation with dedicated mic, ANT+ support, 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)