Samsung Galaxy J1 Dual Sim J100H/DS (Blue) 5MP rear camera and 2MP front facing camera 4.3-inch WVGA PLS display, TFT multi-touch capacitive touchscreen Android v4.4.4 KitKat OS with 1.2GHz dual core processor, 512MB RAM, 4GB internal memory expandable up to 128GB and dual micro SIM (GSM+GSM) 1850mAH lithium-ion battery providing talk-time of 10 hours on 3G networks