I have been a loyal customer of T-mobile for 5 yrs +, and payed my bill on time always. I recently changed my coverage to Sprint for better coverage, & discount through employer. I verified that I was not breaking my contract with T-mobile and advised I was fine. I payed off my account thought things we're closed with T-mobile, but still getting phone calls that my account is past due, and then a letter needing $265.00 more dollars. I called billing & customers service today, and was advised that since I kept my old phone number... read full review »