Both carriers are using the latest network technology that are based on Global System for Mobile Communications (GSM) and Universal Mobile Telecommunications System (UMTS) standards which allows sharing of voice and data traffic.
It’s important to note that both carriers were previously denied to merge last year. AT&T attempted to acquire T-Mobile for $39 billion in 2011. The deal, which could change the game, was eventually denied by the federal regulators. But in spite of the failed merger, it’s nice to hear that both carriers are still working together hand in hand.