T-Mobile today announced Data Stash, a way for customers to retain unused data from month-to-month. Rather than allow unused data to expire, T-Mobile will let customers keep access to that data for up to a year. For example, customers who have a plan with 5GB of data access per month, but only use 3GB, will see the unused 2GB added to their monthly allotment for the following month for a total of 7GB. Further, to kickstart the whole service, T-Mobile is putting 10GB of data in each customer's "data bank." T-Mobile is requiring a minimum level of service in order to qualify for Data Stash. Data Stash will be available for free to T-Mobile customers with a postpaid Simple Choice plan who have purchased at least 3GB of phone data or 1GB of tablet data per month. T-Mobile said there's no limit to how much data users can collect and store in Data Stash. The company said "you won’t lose data you don't use."


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