LXLG&reg; Unlocked Cellphones 6.0" Anroid 5.1 Dual Sim MTK6580 Quad Core ROM 4GB 5.0MP Camera GSM Smartphone 3G Moblie Phone Gold Please open back case to remove the insulating tape on battery before startup! 6.0 inch 540 x 960 Screen System: Android 5.1 MTK6580 Quad Core 1.3GHz Mali-400MP RAM&ROM: 512MB RAM + 4GB ROM Dual Cameras, front camera 0.3MP, back camera 5.0MP Support: Browser, 3G, Calendar, E-book, Wi-Fi, Calculator, MP3, FM, People, MP4, Bluetooth, Sound Recorder, GPS, Alarm 3G (WCDMA 850/2100) and 2G Quad Band International Version (GSM 850/900/1800/1900) network of US Compatible Nationwide on all GSM Networks including AT&T, T-Mobile, H20,Cricket, Tracfone, Straight Talk and others T-Mobile: Lyca, Speedtalk, Go Smart, Simple Mobile, Net10, Straight Talk, Solavei, Ultra Mobile, Telcel America, Walmart Family Mobile. Note:A SIM card need to be purchased separately. Some network company provide the GSM/WCDMA sim card and CDMA sim card also, please buy the GSM/WCDMA SIM card. Do not buy the CDMA SIM card from them.