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TMO News reports that T-Mobile USA will start offering its users who are using unlocked iPhones on their network additional support.
Though T-Mobile USA is the only US Carrier among the top 4 carrier not to offer Apple's iPhone, it had revealed last year that more than a million unlocked iPhones are used on their network.
Back in July 2011, T-Mobile USA started offering micro-SIM cards, which is required for iPhone 4 and iPhone 4S.