Internet not working on a TP2 I received from a friend.. it has JUICY R3

[cpgottabuh]

I just got this phone yesterday from a friend. The internet has not worked all day. I connected it Sunday at around 3pm, and they said it might take a few hours. Its been 12 hours and the internet will not work. I am getting the error67, and also the #777 error. I was reading that i cannot let them know I have a different ROM on the phone or they cancel warranty or w/e.. I was reading about the different codes to put in to edit the PRI and MSL or something like that. Anyways, some please help me as I live on my phones internet all day. Thanks!