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Samsung Galaxy S8 vs Oppo A57

2G Network SIM1: GSM 850 / 900 / 1800 / 1900 SIM2: GSM 850 / 900 / 1800 / 1900 - SIM1: SIM1 GSM 850 / 900 / 1800 / 1900SIM2: GSM 850 / 900 / 1800 / 1900  
3G Network HSDPA HSDPA 850 / 900 / 2100  
4G Network LTE LTE band 1(2100), 3(1800), 5(850), 8(900), 38(2600), 39(1900), 40(2300), 41(2500)  
Dimensions N/a 163.7 x 75 x 8 mm  
Sim Type Dual Sim, Dual Standby (Nano-SIM)  
Weight N/a 187 g  
Display Type Super AMOLED capacitive touchscreen, 16M colors, Always-on display, TouchWiz UI IPS LCD Capacitive Touchscreen, 16M Colors, Multitouch   60Hz  
Display Size 5.2 Inches, 2160 x 3840 pixels (~847 ppi pixel density) 6.53 Inches   720 x 1612 Pixels (~270 PPI)  
Multitouch Yes
Protection Corning Gorilla Glass 4
Memory 64/128GB built-in 64GB Built-in, 3GB RAM  
Card slot microSDXC  
RAM 6GB RAM
GPRS Yes Yes
EDGE Yes
WLAN WLAN (Wi-Fi 802.11 a/b/g/n/ac Wi-Fi 802.11 a/b/g/n/ac, dual-band, hotspot  
BlueTooth Bluetooth v4.2 with A2DP v5.0 with A2DP, LE  
USB USB (microUSB v2.0, USB Host) USB-C port  
NFC No  
GPS Yes Yes + A-GPS support  
Main Camera 12 MP Dual, phase detection autofocus, OIS, dual-LED (dual tone) flash, Geo-tagging, simultaneous 4K video and 9MP image recording, touch focus, face/smile detection, Auto HDR, panorama, Video (2160p@60fps, 1080p@120fps, HDR, dual-video rec), Dual 13 MP, f/2.2, 26mm (wide), 1/3.06", AF + 2 MP, f/2.4, (depth), LED Flash   Geo-tagging, touch focus, face detection, HDR, panorama, Video (1080p@30fps)  
Front Camera 8 MP, f/2.0, (wide), HDR, Video (1080p@30fps)  
OS Android OS, v7.0 Android 11 OS  
Chipset MediaTek MT6765G Helio G35 (12 nm)  
Processor N/a Octa-core (4 x 2.3 GHz Cortex-A53 + 4 x 1.8 GHz Cortex-A53)  
GPU PowerVR GE8320  
Sensors Accelerometer, gyro, proximity, compass, barometer, heart rate, SpO2, Fingerprint Accelerometer, Compass, FingerPrint, Proximity  
Browser HTML5 HTML5  
Sound 3.5mm audio jack, MP3/WAV/WMA/eAAC+/FLAC player, MP4/DivX/XviD/WMV/H.264 player, SNS integration, YouTube, Google Talk, Games (built-in + downloadable) 3.5mm Audio Jack, MP4/H.264/FLAC player, MP3/eAAC+/WAV player, Speaker Phone  
Colors Black, White, Gold, Silver, Pink Gold Glowing Green, Glowing Black  
Battery Non-removable Li-Ion battery (Li-Po Non removable), 5000 mAh   - Fast charging 33W, 50% in 30 min (advertised)  
Misc GPS + A-GPS support & GLONASS, Active noise cancellation with dedicated mic, Samsung Pay (Visa, MasterCard certified), Fast battery charging, Qi/PMA wireless charging (market dependent), S-Voice natural language commands and dictation, IP68 certified - dust proof and water resistant over 1.5 meter and 30 minutes, ANT+ support, Photo/video editor, Document editor, Google Search, Maps, Gmail,input (Swype), YouTube, Calendar, Speakerphone SMS (threaded view), MMS, Email, Push Email   IPX4 water resistant, IP5X dust resistant ,Glass front, Plastic frame, Plastic back, Document viewer, Photo/video editor