At a presentation during the Consumer Electronics Show, T-Mobile announced it will start refunding customers for unused data. The mobile carrier will credit customers for up to $20 per line if less than 2GB are used in a billing cycle. The program, called KickBack, will start January 22 and will show up on February's bills. T-Mobile also said that it will no longer charge customers fees and taxes. The advertised price per line is the price customers will pay.