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Microsoft Lumia 640 XL vs Xiaomi Redmi 13C

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 / 1900 / 2100  
4G Network LTE band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 38(2600), 39(1900), 40(2300), 41(2500)  
Dimensions 157.9 x 81.5 x 9 mm 168 x 78 x 8.1 mm  
Sim Type Dual Sim, Dual Standby (Nano-SIM)  
Weight 171 g 192 g  
Display Type IPS LCD capacitive touchscreen, 16M colors, ClearBlack display IPS LCD Capacitive Touchscreen, 16M Colors, Multitouch   90Hz, 450 nits (typ), 600 nits (HBM)  
Display Size 5.7 inches (~69.1% screen to body ratio), 720 x 1280 pixels (~259 ppi pixel density) 6.74 Inches   720 x 1600 Pixels (~260 PPI)  
Multitouch Yes
Protection Corning Gorilla Glass 3 Corning Gorilla Glass  
Memory 8GB built-in 128GB Built-in, 4GB RAM  
Card slot microSD card (supports up to 128GB) microSDXC (dedicated slot)  
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  
BlueTooth Bluetooth v4.0 with A2DP v5.3 with A2DP, LE  
USB USB (microUSB v2.0) USB Type-C 2.0  
NFC Yes  
GPS Yes Yes + A-GPS support & Glonass, BDS  
Main Camera 13 MP, 4128 x 3096 pixels, Carl Zeiss optics, autofocus, LED flash, 1/3'' sensor size, Video (1080p@30fps), Triple camera: 50 MP, f/1.8, 28mm (wide), PDAF + 2 MP, f/2.4, (macro) + 0.08 MP (auxiliary lens), LED Flash   Phase detection, geo-tagging, touch focus, face detection, HDR, panorama, Video (1080p@30fps)  
Front Camera 5 MP, 1080p 8 MP, f/2.0, HDR, Video (1080p@30fps)  
OS Microsoft Windows Phone 8.1 with Lumia Denim Android 13 OS  
Chipset Qualcomm Snapd Mediatek MT6769Z Helio G85 (12nm)  
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-G52 MC2  
Sensors Accelerometer, proximity, compass Accelerometer, Compass, Fingerprint (side mounted), Virtual proximity sensing  
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 Midnight Black, Navy Blue, Glacier White, Clover Green  
Battery Talk-time up to 31 hrs 20 min 3000 mAh (Li-Po Non removable), 5000 mAh   - Fast battery 18W wired, PD  
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   NFC (market dependent), Photo/video editor, Document viewer