T-Mobile Allows Subscribers to Hold on to Unused Mobile Data

T-Mobile USA will allow customers to roll their unused mobile Internet data into the next month’s billing.

Or, as John Legere, the company’s chief executive, put it in a video broadcast: “What you don’t use, you won’t lose.” T-Mobile customers will receive 10 gigabytes in their stash of data for free. You will lose unused data, however, if you roll it over and don’t use it after a year. Customers also have to first use up their 10 gigabytes before over the use of rollover data begins.

The announcement is the first of its kind for the American wireless industry.