Originally Posted by wayneholbrook
What happens if I erase all that info or change it to tmo if something has to be there, what would be different?
would the PTT finally disappear, would that web browser AT&T icon finally disappear?
you need to change it for some third-party apps to be able access data on t-mobile.
it won't change anything on the blackberry itself.
you can remove PTT by grabbing the latest OS and modifying the .alx files. search for threads with step-by-step instructions.
you can try removing all the service books and then reloading the t-mobile ones to see if some of the at&t stuff disappears.
the icon for the browser is theme-dependent. you can install all the vendor themes by modifying .alx files too. edit: like jsanders said, you'll need a t-mobile blackberry plan.