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Nokia Lumia 925 vs Vivo Y55

2G Network GSM 850 / 900 / 1800 / 1900 SIM1: GSM 850 / 900 / 1800 / 1900SIM2: GSM 850 / 900 / 1800 / 1900  
3G Network HSDPA 850 / 900 / 1900 / 2100 HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100  
4G Network LTE band 1(2100), 3(1800), 7(2600), 8(900), 20(800)  
Available Available. Released 2013, September
Dimensions 160.80 x 73.79 x 8.42mm  
Sim Type Micro-SIM Dual Sim, Dual Standby (Nano-SIM)  
Weight 139 g (4.90 oz) 182 g  
Display Type AMOLED capacitive touchscreen, 16M colors AMOLED Capacitive Touchscreen, Multitouch  
Display Size 768 x 1280 pixels, 4.5 inches (~332 ppi pixel density) 6.44 Inches   1080 x 2400 Pixels (~409 PPI)  
Memory 16 GB Internal, no Card Slot 128GB Built-in, 8GB RAM  
Card slot microSD Card, (supports up to 1TB)  
RAM 1GB
GPRS Class B Yes
EDGE Up to 236.8 kbps
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, Wi-Fi Direct, hotspot  
BlueTooth Yes, v3.0 with A2DP v5.1 with A2DP, LE  
USB Yes, microUSB v2.0 USB Type-C, USB On-The-Go  
NFC Yes  
GPS Yes, with A-GPS support and GLONASS Yes + A-GPS support, & GLONASS, BDS, GALILEO, QZSS  
Main Camera 8 MP, 3264 x 2448 pixels, Carl Zeiss optics, optical image stabilization, autofocus, dual-LED flash Triple Camera: 50 MP, f/1.8, 26mm (wide), PDAF + 2 MP, f/2.4, (macro) + 2 MP, f/2.4, (depth), Dual LED Flash   Night, Portrait, Photo, Double Exposure, Live Photo, Panorama, Slow Motion, Time-Lapse, Pro, Video  
Front Camera Yes, 1.3 MP, 720p@30fps 16 MP  
OS Microsoft Windows Phone 8, upgradeable to WP8 Amber Android 12 OS  
Chipset Qualcomm Snapdragon 680 4G  
Processor Dual-core 1.5 GHz Krait Octa core (4 x 2.4 GHz Kryo 265 + 4 x 1.9 GHz Kryo 265)  
GPU Adreno 610  
Sensors Accelerometer, Compass, Fingerprint (side mounted), Gyro, Proximity  
Browser HTML5 HTML5  
Radio FM radio
Sound 3.5mm HeadJack, Loud Speaker 3.5mm Audio Jack, MP4/H.264 player, MP3/WAV/eAAC+/FLAC player, Speaker Phone  
Colors Black, White, Gray Midnight Galaxy, Ice Dawn  
Battery Non-removable Li-Ion 2000 mAh battery (BL-4YW) (Li-Po Non removable), 5000 mAh   - Fast charging 44W  
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 Mail, IM   Glass front, Plastic frame, Plastic back, Active noise cancellation with dedicated mic, Document viewer, Photo/video editor