Tech T-Mobile gets into banking, offering 4% interest and no fees on its free checking account April 18, 2019Eli Blumenthal and Janna Herron, USA TODAYComments Off on T-Mobile gets into banking, offering 4% interest and no fees on its free checking account T-Mobile is jumping into the banking business with a checking account that offers no fees, no minimums and up to 4% in interest.