How important is that number? Not to be off topic but I only ask because as a person who has moved from Vancouver to Asia twice, I found when I forwarded my local phone to my Taiwan or China telephone number, I found friends forget that I am in a different time zone.

They constantly phoned me at times that was convienent for them thus between 1 am to 4 am we received calls. It was really maddening when I started getting telephone solicitors calling at 2 am.

I realized real friends don't mind spending a few coins to call me or use skype to talk to me when I am awake.

The porting of the number, keeping the number is the easy part. Being civil when they "forget" and call you at ungodly hours was the hard part for us.