A little help.
I unlocked the phone by using iUnlock on the virgin 1.0.2.
Then I accidently click to upgrade to 1.1.1, after that phone is locked.
So I restore the phone back to 1.0.2, and I got the error message
"Incorrect SIM. Insert an unlocked and valid SIM to acivate the iPhone" .
I think iUnlock changed the IMIE on my phone.
How can I fix this? Thank you in advance for the expert.