T-Mobile announces Data Stash!

T-Mobile becomes the only national wireless provider to let you roll your unused high-speed data into the next month Every Data Stash arrives with a free 10 GB of to start. Starting in January 2015, Data Stash will be automatically available at no extra charge to every T-Mobile customer ? every individual, family and business ? with a postpaid Simple Choice plan who has purchased additional 4G LTE data, 3GB or more for smartphones and 1 GB or more for tablets. And, you?ll start out with a Free Data Stash with up to 10 GB of 4G LTE data.