The Nokia Lumia 638 is powered by a Quad-core 1.2 GHz Cortex-A7 CPU processor with 1 GB RAM. The device also has 8 GB internal storage + microSD (up to 128 GB) and a 4.5-inch IPS LCD capacitive touchscreen (480 x 854 pixels, 218 ppi) display. It has a 5MP rear camera and supports Wifi, GPS, 3G and 4G LTE. It packs in a Removable Li-Ion 1830 mAh battery (BL-5H) at 9.2mm device thickness and weight 136g, running on Microsoft Windows Phone 8.1.
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