Will my original iPad unlimited AT&T data plan be grandfathered to the iPad 3?

[zman]

I just moved my plan to my new iPad and it couldn't have been simpler. Go to Settings/Cellular Data/View Account. You get a box that includes existing account? follow the instructions and you should have no problem. If you do not have your account password, you will need to go to an AT&T store.

Finally did it last night. Quick and painless AND still unlimited

 

[Dragonrider]

I just moved my SIM card - worked just fine on ATT.

 

[MikesTooLz]

Finally did it last night. Quick and painless AND still unlimited

You are going to want to not just move the simcard since LTE requires the newer simcard. You wont get LTE if you use the older 3G simcard.

Best option is to use the simcard that came with the iPad and just go into settings and sign in to your account with the new iPad to register the new simcard in the system.

 

[bdegrande]

I transferred my unlimited plan online. Very easy, took about 2 minutes.