Unlocking (orange uk) iPhone from abroad.

Hello,

I got an iPhone 4 from an uncle of mine that returned from UK. He couldn't use it in Portugal so I gladly took it 🙂

Now I'm in The Netherlands and I'm trying to unlock it tu use it as a phone. Unfortunately I cannot contact Orange in anyway or even find out how to unlock the phone without being a (long term) costumer.

Does anybody know how to do it?

Regards,

Adriano