Not sure of the easiest way...but I wanted to express how hard it is to have this done in the stores.....
When you go into a store to have your contacts swapped, they will use the cellbrite machine. Today was the first day our store tried to do a contact transfer from the old phone to the new one....let me tell you. After going through all of the staff in the store, including me
, wideawake had to come figure it all out. It's not easy!!! A lot harder than a normal transfer on windows mobile.
I wouldn't recommend trying to have your contacts swapped in a store in other words!!!