hey, i have a 3g "unlocked" by a "3g Revolution" (that's the namebrand), well when i connect it to itunes, itunes detects my sim saying it's not a activated ATT sim. i dont want to sync anything else but music music music :). anything i can do to go around having this error message? i tried downgrading to 7.7 itunes, thinking i was going to win, lol...than it says "Yo bro! this iphone needs 8.0!". i tried searching this on hackint0sh, it was a no go.
Just make sure you are not on the latest baseband.(228)
Im not the "smart" at all in the iPhone things.
From my experience, has 2 things;
Syn it without sim card or turn on the airplane mode. Try it! Good luck.