T-Mobile USA was again absent from Apple’s official list of carrier partners for the new iPhone in the U.S. But that isn’t stopping T-Mobile to stock nano-SIMs to attract unlocked iPhone 5 owners.

TmoNews reports that iPhone 5-ready nano-SIM cards have started arriving at some T-Mobile retail stores on Saturday, a week earlier than expected.

Apple is currently not offering factory unlocked iPhone 5 in U.S., but we expect it to start selling factory unlocked iPhone 5s later this month. Apple had briefly revealed pricing for the factory unlocked iPhone 5s would be $649, $749 and $849 for the 16GB, 32GB and 64GB models, respectively.

It must be noted that iPhone 5 won’t support T-Mobile’s 3G network, so users will be limited to 2G EDGE service, unless they’re in Seattle, Las Vegas, Washington DC, the New York metro area (Update: Check out this link for the latest T-Mobile USA’s HSPA+ network. Thanks Dave for the tip!) where T-Mobile has launched its iPhone compatible HSPA+ network. T-Mobile  plans to launch 4G HSPA+ service in the 1900 MHz band in a large number of markets by the end of the year and also plans to roll out 4G LTE network in 2013.

It has also announced a major marketing initiative dubbed “Bring your own iPhone” in September to attract iPhone owners. As part of the initiative, T-Mobile will be offering considerably cheaper plans for unlocked iPhones along with an unlimited data subscription, which many U.S. carriers like AT&T and Verizon have stopped offering.

Do any of you plan to buy a factory unlocked iPhone 5 to use it on T-Mobile’s network?

[via TmoNews]