BLU Energy JR - 4.0" GSM Unlocked Smartphone -3,000 mAh Battery - Black Unlocked Dual SIM smartphone, Android 4.4 Kit Kat 4.0" Capacitive Touch panel display 3,000 mAh Super Battery that offers up to 96 Hours of standard usage and 30 stand by 3.2 MP Main Camera with LED flash + VGA Front Camera; 512MB Internal memory 256MB RAM Micro SD up to 64GB GSM Quad band 2G (850/900/1800/1900): compatibility Nationwide on T-Mobile, Straight Talk, Simple Mobile, or any other carrier that accepts a 2G GSM Sim Card. Will NOT work with 3G only providers like ATT nor any CDMA Carriers (Verizon, Sprint, Boost, PagePlus)