transferring contacts from 3gs to iphone 4
I was having trouble with this for a couple of days and I had to come back here and tell everyone since what i figured out took less than 30 seconds.
The "bump" app has an option for sending contacts from one phone to another. It actually had the option to "select all" contacts. You just have to have the app on both phones and will need wifi since your old phone is deactivated.
I don't know if they charge for the app, it was one of the first apps i got on the 3gs, but i would say it was worth a few bucks for this process. You can also use it for pictures.
Here is what i did to show how easy it was...
Open "bump" app
select "contacts"
select "others"
select "add contacts"
select "select all"
bump them together and you are done.