Mobile Phone Travel

CMDA - Code Division Multiple Access.

GSM - Global System for Mobile.

- GSM cellular phones use a sim card to maintain the users data.

- GSM uses 900 and 1800 MHz in most of the world, 850 and 1900 MHz in North America.

- GSM 400 and 450 MHz are also still in use in some Scandinavian countries.

- Quad-band phones feature all four prevalent GSM frequencies: 850, 900, 1800 and 1900 MHZ.

- GSM in the US is largely Cingular and T-Mobile, CDMA in the US is largly Sprint and Verizon.

- CDMA and GSM both use radio to transmit and receive voice information.

- Throughout the world there is not standard power adapter.


- Be sure to have a power-adapter/convertor when visiting another country that does use the 110 North American standard.

- While roaming in another country be sure to check your cellular providor's per minute roaming charges.

Major Wireless Providors:
Cingular Wireless
Verizon Wireless
Rogers Communcations
Sprint
T-Mobile
Globalstar Satellite
Iridium Satellite