sorry if im in the wrong place

[wrevanson]

I don't know how these things are supposed to work, so here it is. I have a samsung galaxys2 sgh-t989 with a straight talk sim card installed, the phone was originally set up for t-mobile, what i need to do is delete the t-mobile apn because it keeps defaulting back to that apn, preventing me from connecting to the network, when i try to use the various app to backup and restore apn's i get the same message, that third parties are not allowed access, i think i need to go to the system and do the work there, my phone is rooted with super user and titanium backup, would any of you all know how to do this inside the android system, if i.m saying it right. thanks.

 

[prozacfield]

Have you tried just deleting this APN in settings?