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Nokia Lumia 925 vs Oppo A57

2G Network 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), 8(900), 38(2600), 39(1900), 40(2300), 41(2500)  
Available Available. Released 2013, September
Dimensions 163.7 x 75 x 8 mm  
Sim Type Micro-SIM Dual Sim, Dual Standby (Nano-SIM)  
Weight 139 g (4.90 oz) 187 g  
Display Type AMOLED capacitive touchscreen, 16M colors IPS LCD Capacitive Touchscreen, 16M Colors, Multitouch   60Hz  
Display Size 768 x 1280 pixels, 4.5 inches (~332 ppi pixel density) 6.53 Inches   720 x 1612 Pixels (~270 PPI)  
Memory 16 GB Internal, no Card Slot 64GB Built-in, 3GB RAM  
Card slot microSDXC  
RAM 1GB
GPRS Class B Yes
EDGE Up to 236.8 kbps Yes
3G Yes
WLAN Wi-Fi 802.11 a/b/g/n, dual-band, DLNA, Wi-Fi hotspot Wi-Fi 802.11 a/b/g/n/ac, dual-band, hotspot  
BlueTooth Yes, v3.0 with A2DP v5.0 with A2DP, LE  
USB Yes, microUSB v2.0 USB-C port  
NFC No  
GPS Yes, with A-GPS support and GLONASS Yes + A-GPS support  
Main Camera 8 MP, 3264 x 2448 pixels, Carl Zeiss optics, optical image stabilization, autofocus, dual-LED flash 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 Yes, 1.3 MP, 720p@30fps 8 MP, f/2.0, (wide), HDR, Video (1080p@30fps)  
OS Microsoft Windows Phone 8, upgradeable to WP8 Amber Android 11 OS  
Chipset MediaTek MT6765G Helio G35 (12 nm)  
Processor Dual-core 1.5 GHz Krait Octa-core (4 x 2.3 GHz Cortex-A53 + 4 x 1.8 GHz Cortex-A53)  
GPU PowerVR GE8320  
Sensors Accelerometer, Compass, FingerPrint, Proximity  
Browser HTML5 HTML5  
Radio FM radio
Sound 3.5mm HeadJack, Loud Speaker 3.5mm Audio Jack, MP4/H.264/FLAC player, MP3/eAAC+/WAV player, Speaker Phone  
Colors Black, White, Gray Glowing Green, Glowing Black  
Battery Non-removable Li-Ion 2000 mAh battery (BL-4YW) (Li-Po Non removable), 5000 mAh   - Fast charging 33W, 50% in 30 min (advertised)  
StandBy Time (2G) / Up to 440 h (3G)
TalkTime Up to 18 h 20 min (2G) / Up to 12 h 40 min (3G)
Misc SMS (threaded view), MMS, Email, Push Email   IPX4 water resistant, IP5X dust resistant ,Glass front, Plastic frame, Plastic back, Document viewer, Photo/video editor