Nokia Lumia 638

Network
Technology GSM / HSPA / LTE
2G bands GSM 850 / 900 / 1800 / 1900
3G bands HSDPA 850 / 900 / 1900 / 2100 – RM-1010
4G bands LTE band 3(1800), 7(2600), 38(2600), 39(1900), 40(2300), 41(2500)
Speed HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps
GPRS Yes
EDGE Yes
Launch
Announced 2014, December
Status Available. Released 2014, December
Body
Dimensions 129.5 x 66.7 x 9.2 mm (5.10 x 2.63 x 0.36 in)
Weight 136 g (4.80 oz)
SIM Micro-SIM
Display
Type IPS LCD capacitive touchscreen, 16M colors
Size 4.5 inches (~64.6% screen-to-body ratio)
Resolution 480 x 854 pixels (~218 ppi pixel density)
Multitouch Yes
Protection Corning Gorilla Glass 3
– ClearBlack display
Platform
OS Microsoft Windows Phone 8.1
Chipset Qualcomm Snapdragon 400
CPU Quad-core 1.2 GHz Cortex-A7
GPU Adreno 305
Memory
Card slot microSD, up to 256 GB (dedicated slot)
Internal 8 GB, 1 GB RAM
Camera
Primary 5 MP, autofocus
Features 1/4″ sensor size, geo-tagging, panorama
Video Yes
Secondary No
Sound
Alert types Vibration; MP3, WAV ringtones
Loudspeaker Yes
3.5mm jack Yes
– Active noise cancellation with dedicated mic
Comms
WLAN Wi-Fi 802.11 b/g/n, DLNA, hotspot
Bluetooth v4.0, A2DP, LE/ aptX after WP8 Denim update
GPS Yes, with A-GPS, GLONASS
Radio FM radio
USB microUSB v2.0
Features
Sensors Accelerometer
Messaging SMS (threaded view), MMS, Email, Push Email, IM
Browser HTML5
Java No
– MP3/WAV/eAAC+/WMA player
– MP4/H.264/WMV player
– OneDrive (15 GB cloud storage)
– Document viewer
– Video/photo editor
Battery
Removable Li-Ion 1830 mAh battery (BL-5H)
Misc
Colors Black
SAR EU 1.46 W/kg (head)     0.95 W/kg (body)
Price group 2/10 (About 100 EUR)
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