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Old Sep 4, 2012 | 7:15 pm
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gfunkdave
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Originally Posted by TWA884
The McWorld article I linked above discusses that issue.

AT&T iPhones are locked to the micro-SIM card in the slot. Sprint iPhones are unlocked. Verizon will provide an “international unlock” upon request to customers who have been in good standing for 60 days.
Sprint and Verizon both lock their iPhone 4S but will unlock upon request for accounts in good standing.

Sprint and Verizon both offer several models of dual mode CDMA/GSM phones including iPhone 4S, Android phones, and Blackberries.

To complicate things, the GSM/CDMA divide was really a 2G technology description. In the 3G and 4G world, both technologies actually are CDMA-based. The GSM 3G standard is officially W-CDMA, and the CDMA 3G standard is CDMA2000. And I believe everyone has converged on LTE as a 4G standard.

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