Apple has confirmed that it will begin sell a new version of its A1428 iPhone 5 model in order to support additional Advanced Wireless Services (AWS) bands for T-Mobile’s network, according to a report. Current iPhone 5 users will not be able to gain the new AWS support via any kind of software update; instead, Apple is updating the current A1428 model of the iPhone 5, and will begin to sell it on April 12, the same day the device comes to T-Mobile.…