![]() I paid full retail so there would be no restrictions from Verizon with regard to unlocking the handset. Last month I purchased an iPhone 4S from Best Buy Mobile for use on my Verizon account. It also means that the consumer only needs one phone to travel anywhere in the world, absent a lack of roaming agreements between their home carrier and the system they are trying to use while out of the country. Rather than having to produce a GSM version and a CDMA version of their popular phone as they had done in the past, they combined the two protocols in one chip set, which should save the company potentially billions of dollars, and make distribution and logistics infinitely simpler. The 4S meets this requirement almost everywhere.Īpple did a very smart thing when they designed the 4S. International phones have to accommodate different protocols and frequency bands for voice and data services, depending upon carrier and location. Internationally there are about 40 CDMA countries and more than 220 GSM venues. In the United States CDMA is the protocol for Verizon and Sprint, while GSM is used by AT&T and T- Mobile. ![]() ![]() This means the iPhone can theoretically be used on any CDMA or GSM network, in any country. The iPhone 4S is the first device produced by Apple that is a dual-mode phone. ![]()
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