Edward C. Baig

USA TODAY

NEW YORK — T-Mobile will let you roll forward your unused high-speed data from month to month, CEO John Legere announced Tuesday.

And to kickstart this new Data Stash feature, the nation's fourth-largest wireless carrier is dishing out 10GB of 4G LTE data for free.

Data Stash is the latest of T-Mobile's so-called "Uncarrier" initiatives to rattle the wireless industry. It will automatically be available at no extra charge to every T-Mobile customer with a postpaid Simple Choice plan who has purchased 3GB or more of 4G LTE smartphone data and 1 GB or more for tablets.

"Can you imagine your gas station siphoning unused gas from your car each month? The U.S. wireless industry is even worse," said T-Mobile CEO John Legere in a release. "Americans have been gamed by the carriers into buying huge data plans — all to avoid getting screwed with overage penalties. Only to find out they bought more than they need, which is then confiscated by the carrier. For the consumer it's lose, lose."

Customers can roll the data into their personal Data Stash for up to a year, once they've exhausted the one-time 10GB gift. T-Mobile says its LTE network now reaches 260 million people across the U.S., with 10 million added during the last 60 days. It expects to reach 300 million in the New Year.

Listen below to our analysis of the latest T-Mobile promotion, with myself, USA TODAY's Jefferson Graham and Eli Blumenthal, and KING-TV's Brian Westbrook.

Email: ebaig@usatoday.com; Follow @edbaig on Twitter