T-Mobile
Steals minutes from PREPAID accounts and intentionally gives you no way to look at your calls to prove it
I discovered that T-Mobile can blatantly steal minutes from your pre-paid account, and they've set it up so that there is no way for you to complain or prove it. So, I've been a T-Mobile customer for years. Since my contract was long satisfied, I switched over to a pre-paid account about a year ago ...