Just under two weeks ago, T-Mobile announced at long last, they were finally going to carry the iPhone 5. At the time, interested customers to pre-register for their device.

Today, official pre-orders begin. You can access all the iPhones that T-Mobile offers here.

The 16GB iPhone 5 starts at $99.99, with a monthly payment of $20 per month got 24 months. Without the plan, it’ll cost $579.99 up front. The 32GB iPhone with with run $199.99 with a 2-year plan, $679.99 without. And the 64GB device will cost $299.99 with the plan and $779.99 without.

The phone will ship on April 12th.

Also, if you want a cheaper option, T-Mobile is offering the iPhone 4S for $69.99 down and $20 per month for 24 months and the iPhone 4 for $14.99 down and $15 per month for 24 months.

“This is an important day for people who love their iPhone but can’t stand the pain other carriers put them through to own one,” said John Legere, president and CEO of T-Mobile USA when he announced the addition. “We feel their pain. I’ve felt the pain. So we’re rewriting the rules of wireless to provide a radically simple, affordable iPhone 5 experience — on an extremely powerful network.”

Speaking of pain, plenty of T-Mobile customers painfully waited for the company to offer the iPhone 5. As you probably know, T-Mobile was the last of the major U.S. carriers to offer the device, trailing AT&T, Verizon, and Sprint.

Apple’s App Store went down early this morning, but it wasn’t because of the T-Mobile addition. When buying an iPhone via the Apple online Store, T-Mobile has yet to be included as an option.