I can't now because the auction's already online advertised with the sim card and people have bid on it.
I don't really understand this locking/unlocking business.
The phone I've just bought, they installed the sim card for me and they definitely locked the phone to the Vodaphone network. If somehow I got the phone unlocked, could I then use a sim card for any network say T-Mobile or Orange etc? What about the phone number and all the features I have on the phone, presumably those features would still be there but would the display be different and would the phone number be the same? It's a pay as you go top up phone.