Two in particular. 1. Cramming https://arstechnica.com/tech-policy/2014/12/t-mobile-gives-up-fight-over-cramming-fees-will-pay-90m-back-to-customers/ https://a

Two in particular. 1. Cramming https://arstechnica.com/tech-policy/2014/12/t-mobile-gives-up-fight-over-cramming-fees-will-pay-90m-back-to-customers/ https://arstechnica.com/tech-policy/2014/12/t-mobile-gives-u... 2. They had a "free for life" 200MB? data plan for the Nexus 7 tablet kept billing me every month. It was a monthly ritual for about six months. Call, explain, get adjusted.