Darrell Etherington, TechCrunch:

T-Mobile is kicking off its official sales of the iPhone 5 today, marking the first time the U.S.’ fourth largest carrier has offered an Apple smartphone. Thanks to T-Mo’s new Uncarrier plans, the iPhone 5 can be had starting at just $99, with two years of $20 monthly payments to cover the balance, or for free if you’re switching from another carrier and bring a device in for trade. So far, so good, according to reports of lines forming at retail stores for a phone that’s now over six months old.

Now the iPhone 5 is available on all four major U.S. carriers (and several MVNOs as well).