can i not put in another PAYG O2 sim ?
Ahh, i wasn't on a contract with them, i got the phone on PAYG !
If you lost the SIM then they can't really unlock the phone, it needs to be on their network to do an unlock remotely.
The Pay and go customers have to wait 1 year as well as pay £15.
That was the case originally but I believe it's changed. There's no longer a one year minimum period.