The deal is done! T-Mobile US Inc. (NASDAQ: TMUS) today announced the completion of its acquisition of Ka’ena Corporation, which includes direct-to-consumer (D2C) prepaid wireless brands Mint Mobile, internationally-focused value brand Ultra Mobile, and wholesale wireless solutions provider Plum. And, as it does, the Un-carrier is letting Mint and Ultra customers know it’s great to have them here by giving them magenta goodness right out of the gate – a few freebies and new offers just for being a part of Team T-Mobile. “I am so proud of the entire Mint Mobile team. Even Gary from Finance who’…