I would try Virgin I gave the store a false address with a false name when they set it up and paid cash. They didn't check to see, but it your call. Now that I think of it kinda funny that I chose 'virgin'.

Buy the phone with cash, buy the minutes with cash, go to a public library and use their internet to register the phone (i.e. no IP address to trace) and use whatever info you want to register it with (just make sure you google the name before you register it because some ladies will check a phone number as part of the verification process and you don't want to fuck-up and register it under a name that's going to be a problem for you).

Good Luck!!

Keystone thanks man. What is your thoughts on using your real name or fake name when registering the phone ?

When you get to the screen asking you for name, etc., scroll to the bottom and there's an option that says "skip this step". I did it and never gave any name or other info.