We can’t say we didn’t know it was coming. T-Mobile already started accepting preorders for the iPhone 5 back on April 5, and today marks the first day of official availability for the iPhone on the carrier’s revamped “Un-carrier”, no-contract, unlimited voice and data plans.

To accompany the launch, T-Mobile is also kicking off its first iPhone ad campaign today that begins with the first TV spot above (via TMO News). Of course the ad not so surprisingly focuses on its new carrier approach more so than the device itself:

“It’s the phone that’s revolutionizing phones, make sure its running on the carrier that’s revolutionizing wireless… Only T-Mobile lets your iPhone 5 be as great as an iPhone 5.”

Earlier this month T-Mobile started rolling out a carrier update for existing unlocked iPhones on its network that brings LTE support, improved battery life, visual voicemail support and more. It also started a campaign offering users trade-in value for their old devices to make the switch to T-Mobile.

The iPhone 5 is available to purchase for $99 down with a $20 per month financing plan through T-Mobile’s website and brick-and-mortar stores. As noted by TMONews, the carrier has also started setting up its in-store displays and advertising for the iPhone (Gallery below):