What Is A Locked Cell Phone?
The two most popular cell phone technologies today are CDMA and GSM; a locked cell phone that uses CDMA carrier cannot be unlocked, while this is not necessarily the case for a GSM phone.

Ring My Bell RingtonesThe two most popular cell phone technologies today are CDMA and GSM; a locked cell phone that uses CDMA carrier cannot be unlocked, while this is not necessarily the case for a GSM phone.