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Microsoft Lumia 640 XL vs Tecno Spark 50

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 / 2100  
4G Network LTE  
Dimensions 157.9 x 81.5 x 9 mm 167.8 x 79.2 x 8.2 mm  
Sim Type Nano-SIM + Nano-SIM  
Weight 171 g 210 g  
Display Type IPS LCD capacitive touchscreen, 16M colors, ClearBlack display IPS LCD Capacitive Touchscreen   120Hz  
Display Size 5.7 inches (~69.1% screen to body ratio), 720 x 1280 pixels (~259 ppi pixel density) 6.78 Inches   720 x 1600 Pixels (~259 PPI)  
Multitouch Yes
Protection Corning Gorilla Glass 3
Memory 8GB built-in 128GB Built-in, 6GB RAM (+12GB Extended RAM)  
Card slot microSD card (supports up to 128GB) microSDXC (dedicated slot)  
RAM 1GB RAM
GPRS Yes
WLAN WLAN (Wi-Fi 802.11 b/g/n Wi-Fi 802.11 a/b/g/n/ac, dual-band  
BlueTooth Bluetooth v4.0 with A2DP v5.3 with A2DP, LE  
USB USB (microUSB v2.0) USB Type-C  
NFC No  
GPS Yes Yes + A-GPS support  
Main Camera 13 MP, 4128 x 3096 pixels, Carl Zeiss optics, autofocus, LED flash, 1/3'' sensor size, Video (1080p@30fps), 50 MP, f/1.9, (wide), PDAF, LED Flash   Panorama, Video (1440p@30fps, 1080p@30fps)  
Front Camera 5 MP, 1080p 8 MP, f/2.0, (wide)  
OS Microsoft Windows Phone 8.1 with Lumia Denim Android 16 OS  
Chipset Qualcomm Snapd MediaTek Helio G81  
Processor 1.2 GHz Quad-Core Cortex-A7 Octa-core (2 x 2.0 GHz Cortex-A75 + 6 x 1.8 GHz Cortex-A55)  
GPU GPU: Adreno 305 Mali-G57 MC2  
Sensors Accelerometer, proximity, compass Accelerometer, Compass, Fingerprint (side-mounted), Proximity  
Browser HTML5 HTML5  
Sound FM radio, 3.5mm audio jack, MP4/H.264/H.263/WMV player, MP3/WAV/eAAC+/WMA player, Video editor, Games (built-in) 3.5mm Audio Jack, Speaker  Phone  
Colors Matte cyan, Orange, Black, Matte white, Glossy white Halo Blue, Titanium Grey, Ink Black, Aurora Purple  
Battery Talk-time up to 31 hrs 20 min 3000 mAh 7000 mAh   - 18W wired  
StandBy Time Stand-by up to 936 hrs
TalkTime Talk-time up to 31 hrs 20 min 3000 mAh
Misc GPS + A-GPS support and GLONASS, Micro-SIM card, Active noise cancellation with dedicated mic, Document viewer/editor, Speakerphone SMS(threaded view), MMS, Email, Push Mail, IM   Glass front, plastic frame, plastic back, IP64 dust tight and water resistant (water splashes), Drop resistant up to 1.5m