What really is Global System for Mobile Communications? ? Article ...

[unable to retrieve full-text content]Different cell phone communities function in different frequencies, so that if you would like make use of your cellphone at an office place, you actually usually have to have a mobile in which sustains various frequency rings.

Source: http://marocsolution.com/health-fitness/acne/what-really-is-global-system-for-mobile-communications/

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