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Nokia Lumia 638 vs Asus A1

2G Network GSM 850 / 900 / 1800 / 1900 850 / 900 / 1800 /1900
3G Network HSDPA 850 / 900 / 1900 / 2100 850 / 900 / 1800 /1900
4G Network LTE 1800 / 1900 / 2100 / 2300 / 2500 / 2600
Available Yes
Dimensions 129.5 x 66.7 x 9.2 mm
Sim Type Dual SIM
Weight 136 g Not disclosed
Display Type IPS LCD capacitive touchscreen, 16M colors, ClearBlack display HD LCD Display
Display Size 480 x 854 pixels, 4.5 inches (~218 ppi pixel density) 5" HD LCD Display
Multitouch Yes
Protection Corning Gorilla Glass 3
Memory 8GB built-in 4 GB, microSD up to 32 GB
Card slot microSD card (supports up to 128GB)
RAM 1GB RAM 1 GB
GPRS Yes Yes
EDGE Yes
3G Yes
WLAN WLAN (Wi-Fi 802.11 b/g/n Wi-Fi 802.11
BlueTooth Bluetooth v4.0 with A2DP Yes
USB USB (microUSB v2.0) Yes
GPS Yes Yes
Main Camera 5 MP, 2592 X 1936 pixels, autofocus, 1/4'' sensor size, geo-tagging, panorama, Video
Front Camera 2 Mega Pixel
OS Microsoft Windows Phone 8.1 Android 4.2
Chipset GPU: Adreno 30
Processor 1.2 GHz Quad-core Cortex-A7, Qualcomm Snapdragon 400 1.2GHz Quad Core
GPU GPU: Adreno 305
Sensors Accelerometer
Browser HTML5 HTML5
Radio Yes
Sound FM radio, 3.5mm audio jack, MP4/H.264/H.263/WMV player, MP3/WAV/eAAC+/WMA player, Video/photo editor, Games (built-in)
Colors Black Black
Battery 1830 mAh 2000 mAh
Misc GPS + A-GPS support and GLONASS, MicroSIM card support only, Active noise cancellation with dedicated mic, Document viewer/editor, Predictive text input, Speakerphone