It's a position they intend to capitalize on, too. The nation's fourth-largest carrier has GSM micro-SIM cards on hand for compatible phones, including the iPhone. Buying one of these micro-SIMs and signing up your unlocked iPhone for a T-Mobile Value plan is all it takes to get started as a T-Mobile customer on the iPhone.
Although T-Mobile doesn't sell any version of Apple's smartphones, a spokesperson told 9to5Mac that there are "more than 1 million unlocked iPhones running on our network."
This isn't the right solution for speed-demons, however. Customers on unlocked iPhones will ride T-Mobile's 2G speeds.
It's no secret that T-Mobile has been thirsting for the iPhone, and back in January, T-Mobile CTO Neville Ray told CNET that he thinks an incompatibility with the carrier's AWS wireless network spectrum was the culprit.
After its failed merger with AT&T, the carrier is now touting its aggressive plan to strengthen its existing HSPA+ "4G" network and build a 4G LTE infrastructure. In addition, T-Mobile has been vocal about expanding HSPA+ to its 1,900MHz PCS spectrum, which would make the faster-than-3G data service compatible with the iPhone and other devices.
Article updated at 12:56pm with 2G network details.