Why won't US cell phones work in other countries?
Most US and Canadian cell phones use the CDMA, TDMA, IDEN or AMPS systems. Generally, the rest of the world uses the GSM 900/1800 MHz system. Two US exceptions are AT&T and T-Mobile, who do use the GSM system but DON'T use the correct frequencies. Further, if you obtained your cell phone directly from your US service provider, it is almost certainly LOCKED to their networks. These phones will not and cannot be made to work internationally.
All Travel Ready Phones are UNLOCKED to work with ANY network and support the international GSM 900/1800 MHz system. Each phone is refurbished to "like new" condition and operationally tested before shipping to insure we provide you with reliable communications during your travels.