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Nokia Lumia 730 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), 8(900), 38(2600), 39(1900), 40(2300), 41(2500)  
Dimensions 134.7 x 68.5 x 8.7 mm 163.7 x 75 x 8 mm  
Sim Type Dual Sim, Dual Standby (Nano-SIM)  
Weight 130 g 187 g  
Display Type AMOLED capacitive touchscreen, 16M colors, ClearBlack display IPS LCD Capacitive Touchscreen, 16M Colors, Multitouch   60Hz  
Display Size 720 x 1280 pixels, 4.7 inches (~316 ppi), Corning Gorilla Glass 3 6.53 Inches   720 x 1612 Pixels (~270 PPI)  
Multitouch Yes
Memory 8GB built-in 64GB Built-in, 3GB RAM  
Card slot microSD card (support up to 128 GB) microSDXC  
RAM 1GB RAM
GPRS Yes Yes
EDGE Yes
WLAN WLAN (Wi-Fi 802.11 b/g/n Wi-Fi 802.11 a/b/g/n/ac, dual-band, hotspot  
BlueTooth Bluetooth v4.0 v5.0 with A2DP, LE  
USB USB (microUSB v2.0) USB-C port  
NFC No  
GPS Yes Yes + A-GPS support  
Main Camera 6.7 MP, Carl Zeiss optics, autofocus, LED flash, 1/3.4'' sensor size, geo-tagging, face detection, panorama, Video (1080p@30fps, stereo sound 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 5 MP, 1080p 8 MP, f/2.0, (wide), HDR, Video (1080p@30fps)  
OS Microsoft Windows Phone 8.1 Android 11 OS  
Chipset GPU: Adreno 30 MediaTek MT6765G Helio G35 (12 nm)  
Processor 1.2 GHz uad-Core Cortex-A7, Qualcomm Snapdragon 400 Octa-core (4 x 2.3 GHz Cortex-A53 + 4 x 1.8 GHz Cortex-A53)  
GPU GPU: Adreno 305 PowerVR GE8320  
Sensors Accelerometer, gyro, proximity, compass Accelerometer, Compass, FingerPrint, Proximity  
Browser HTML5 HTML5  
Sound FM radio, 3.5mm audio jack, MP4/H.264/H.263/WMV player, MP3/WAV/eAAC+/WMA player, Video/photo editor, SNS integration, Games 3.5mm Audio Jack, MP4/H.264/FLAC player, MP3/eAAC+/WAV player, Speaker Phone  
Colors Orange, green, white, black Glowing Green, Glowing Black  
Battery Music play Up to 60 hrs (Li-Po Non removable), 5000 mAh   - Fast charging 33W, 50% in 30 min (advertised)  
StandBy Time Stand-by Up to 600 hrs
TalkTime Talk-time Up to 22 hrs
Misc GPS + A-GPS support and GLONASS, Dual Sim, (Micro-SIM, Dual stand-by , 15GB free SkyDrive storage, Active noise cancellation with dedicated mic, Document viewer/editor, Predictive text input, 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