The phone number has nothing to do with it - I don't have a phone number as I don't have a landline.
You need to reword your question title to get the techies attention:
How do I fake my IP address to another country?
So I can access barred websites.
I know it used to be relatively simple, but it has become harder to do, precisely because of the big companies such as BBC putting content on the web intended for licence paying UK residents. I suspect it can still be done, but I can't do it. I used to enjoy the Pandora website but it is now impossible to access the US site.