I have a 02 UK HTC HD2 which I've taken to Australia with me. I have a Telstra sim card that I bought to use in it however, everytime I put the card in, I get a message saying:
Network Locked, please enter the network code.
and then a white box to enter a code.
I've got an unlock code from 02 UK but thats not working. Does anyone have any other ideas?