I'm fairly sure most phones are GSM. http://en.wikipedia.org/wiki/Comparison_of_mobile_phone_standards#Development_of_the_Market_Share_of_Mobile_Standards http

I'm fairly sure most phones are GSM. http://en.wikipedia.org/wiki/Comparison_of_mobile_phone_standards#Development_of_the_Market_Share_of_Mobile_Standards http://en.wikipedia.org/wiki/Comparison_of_mobile_phone_stan...