For years I was with Virgin but today I've switched to O2 keeping my old number and I'm waiting for my new phone to arrive. I got a PAC code from Virgin yesterday and it's at this point I'm unsure of what to do when the new phone arrives.
All of my contacts are on my Virgin sim. Do I put it into the new phone and move the numbers over or is it done automatically when I ring O2 to activate the PAC code? Will I use my continue to use my old sim or the one that comes with the new phone? My Virgin account will end on 13 June. If I ring O2 later this afternoon to activate the migration, do I continue to use my old phone and sim for a day or two until the transfer takes place, or the new phone with the new sim? If I use the new phone and sim, am I getting charged for calls?
Sorry to seem a bit dim, but I've never had to do this before!