Both carriers have similar programs that allow customers to carry unused data from one month to the next, but it's not as simple as it sounds. This is how these rollover data plans really work.
CNET's Dan Graziano explains the difference between T-Mobile and AT&T's rollover data programs.
Verizon CFO Fran Shammo says the carrier won't be following AT&T and T-Mobile's lead.
First came the news of T-Mobile's Data Stash program. Now AT&T has an offer to let customers carry unused data from one month to the next.
Netgear's first mobile Internet solution uses Sprint cellular service, and costs $25 per 1GB of data with no contract or time restriction.
AT&T actually owns the use of the term "rollover" from its days when it rolled over minutes as Cingular Wireless.
The Uncarrier 8 campaign kicks off with Data Stash, a program that lets you keep what you haven't used. Says CEO John Legere: "If you buy data, it's yours."
Though it still lags in overall number of subscribers, the carrier beat rivals last quarter in terms of gaining new customers and keeping old ones, according to a research firm.
Big Red's latest move gives prepaid subscribers more wiggle room for data consumption.
Cell phone carriers are working hard to poach each other's customers, with rollover deals and tempting family plans. What would it take for you to switch your loyalty?