I unlocked the phone using i_max2k2's tutorial on this site. I had the ATT sim in it all the time, and after unlock, the phone worked fine with the ATT sim.

I changed the SIM card to an old expired TIM (Italy) sim to try it out, and it didn't register the TIM sim. The anySIM message came up, and I pressed the "Unlock red button again"

Now the phone does not work when I insert the ATT SIM, any ideas?

The WiFi, and YouTube do work though.