I am thinking of signing up with T-Mobile and have some questions. Aside from their bizarre VM notification by SMS does anyone have any major problems with T-Mobile's service or the way they do things? When you change handsets is it as simple as swapping the SIM into another T-Mobile (or unlocked) handset or do you have to have CS change the IMEI somewhere in the billing system and, if so, is there a charge to change your IMEI? How is their billing? Did you get what you were promised? Are there a lot of billing errors? Coverage isn't really an issue as I know they pretty much cover where I need to be but do they have a lot of issues with their network such as outages, features not working correctly (or at all?) Is there some sort of non-tax surcharge applied to your bill that is put there by T-Mobile but not mandated by the governtment? It would be labelled some sort of Regulatory or Administrative Surcharge. I will post more questions as I think of them, any help would be greatly appreciated.