Need help downgrading baseband from 6.15.00 to old one
i've been in a lot of pages, guys, you are my last option, this is what's happening (i read the sticky, but was not helpful)
a friend of mine recently bough a 3g with the 4.1.2 software, the thing was not working, so i downgraded to 3.1.2 but the baseband remained 6.15.00, i need this 3G to work with any carrier here in the caribean.
I have tried using redsn0w 0.9.14b2 to downgrade baseband but i keep getting an error (IPSW not supported) so im a little lost here
baseband 6.15.00 (need to downgrade this)
currently not able to make calls.
Any help will be highly appreciated, tanks