Valword Unlocked 4.0 Inch Touch Screen Smartphone Compatible for AT&T T-Mobile Straight Talk Unlocked GSM QuadBand: GSM 850/900/1800/1900MHz WCDMA 850/2100MHz .Dual Sim Cards Slots Dual Standby CPU: MTK6572 Cortex-A7 Dual Core 1.2GHz 4GB ROM 4 Inch Capacitive Touch screen Dual Cameras Front and Back WiFi & Bluetooth Android Play store inside For ATT Tmobile, not for verizon sprint.phone only,without sim card, Straight Talk - Compatible on AT&T and Tmobile towwer at 2G. "NOT COMPATIBLE" on Verizon or Sprint tower, Upgrade your existing phone (make sure sim card is unlocked) or use it on new Straight Talk account. You can call provider for APN setting