Although the deal has yet to be approved, AT&T has provided a bit of insight as to how they plan on transitioning the existing T-Mobile customers to their network.
According to senior AT&T executive, John Stankley, the initial focus will be combining the existing 2G networks of both companies, with the intentions of getting as many customers as possible off the 2G networks over time. The use of T-Mobile’s 1700Mhz spectrum was already mentioned as the means for the planned LTE roll out and remains so with plans to move T-Mobile customers over to AT&T’s 1900MHz spectrum for 3G service. The transition is expected to take anywhere from a year to two depending on the amount of 1900MHz spectrum available.
As mentioned earlier AT&T plans on rolling out LTE service by this Summer in 5 cities and expanding to more by the end of the year with a goal of nationwide coverage by 2013.
Source: Mobile Burn via Fierce Wireless