EMPORIA SOLID PLUS V33i &ndash; Rugged Senior Elderly BIG Button Unlocked GSM Cell Phone, SOS Button, Hearing Aid Compatible , Flashlight , Easy operation ( Dust, Water, Thermal Shock, Vibration RESISTANT ) Removable Li-Ion 1750 mAh battery if the initiation is a problem, need to turn off. Take battery out of compartment.Insert battery and turn on Dust, water, thermal schock, vibration resistant Emergency (SOS) Button, Hearing Aid Compatible Flashlight, easy operation . It is GSM unlocked phone and supports 2G network. Its good for voice and text only. Unlocked GSM phone. Does not work on CDMA network like Verizon, Sprint, Virgin, H2O, etc.