How do I find the unlock code for my Sony Ericsson K800i (on o2) mobile phone?

[AndrewJ]

I wish to format the memory stick on my phone, but it keeps asking me for my 'Phone lock code:' (note: not my PIN number). What and where can I find this phone unlock code?

[Unregistered]

Do you want to remove network lock from your Sony Ericsson k800i ? its simple . you can get Sony Ericsson Unlocking Service from the provdier Wickedunlock.com to unlock your Sony Ericsson from O2 carrier lock .