T-Mobile was the worst, most incompetent company I have had the displeasure of working with in recent years. I fled to Mint. To say I’m chuffed by that acquisition is an understatement.
Long ago I had a T-mobile prepaid plan that had the wrong caller ID info. They claimed it couldn't be fixed because it was prepaid and they were unable to properly manage those accounts. Mint has been much better and will remain cheaper for now.