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Samsung Galaxy A8 2016 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 850 / 900 / 1900 / 2100 HSDPA 850 / 900 / 2100  
4G Network LTE band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 20(800) LTE band 1(2100), 3(1800), 5(850), 8(900), 38(2600), 39(1900), 40(2300), 41(2500)  
Dimensions 158 x 76.8 x 6 mm 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 IPS LCD Capacitive Touchscreen, 16M Colors, Multitouch   60Hz  
Display Size 5.7 inches, 1080 x 1920 pixels (~386 ppi pixel density) 6.53 Inches   720 x 1612 Pixels (~270 PPI)  
Multitouch Yes
Memory 32GB built-in 64GB Built-in, 3GB RAM  
Card slot microSD card (supports up to 128GB) microSDXC  
RAM 3GB 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 v4.0 with A2DP v5.0 with A2DP, LE  
USB USB (microUSB v2.0) USB-C port  
NFC No  
GPS Yes Yes + A-GPS support  
Main Camera 16 MP, 5312 x 2988 pixels, optical image stabilization, autofocus, LED flash, Geo-tagging, touch focus, face detection, panorama, HDR, Video (1080p@30fps), 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 5 MP, 1080p 8 MP, f/2.0, (wide), HDR, Video (1080p@30fps)  
OS Quad-core Cortex-A53, Quad-core Cortex-A57, Exynos 7420 GPU: Mali-T760MP8 Android 11 OS  
Chipset MediaTek MT6765G Helio G35 (12 nm)  
Processor Octa-core (4 x 2.3 GHz Cortex-A53 + 4 x 1.8 GHz Cortex-A53)  
GPU PowerVR GE8320  
Sensors Accelerometer, proximity, compass, Fingerprint Accelerometer, Compass, FingerPrint, Proximity  
Browser HTML5 HTML5  
Sound FM radio with RDS; recording, 3.5mm audio jack, MP4/WMV/H.264 player, MP3/WAV/WMA/eAAC+/FLAC player, YouTube, Google Talk, Games (built-in + downloadable) 3.5mm Audio Jack, MP4/H.264/FLAC player, MP3/eAAC+/WAV player, Speaker Phone  
Colors Pearl White, Midnight Black, Champagne Gold Glowing Green, Glowing Black  
Battery 3050 mAh (Li-Po Non removable), 5000 mAh   - Fast charging 33W, 50% in 30 min (advertised)  
Misc GPS + A-GPS support & GLONASS, Nano-SIM, Active noise cancellation with dedicated mic, ANT+ support, Photo/video editor, Google Search, Maps, Gmail, Document viewer, 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