Hi All here is my little problem:

I have today unlocked an orange 3510i
If I put the wifes o2 PAYG sim in it all is fine
If I put my 02 PAYG sim in it it gives me the SIM REGISTRATION FAILURE.
my sim is OK in 3 other phones

what is going on ???

I unlocked with PW 1 and 7

help please ????
Cheers