Originally Posted by
LIH Prem
If you are talking about the google authenticator app, yes, you have to reestablish the seed on each device which is a bit of a PITA.
you might want to look into Authy since it stores the seed data in the cloud, it works seamlessly across devices. There are other solutions, like 1password.
-David
One other thing: Authy works across devices which means that you don't get locked out of all your accounts if your iPhone is bricked. Highly recommend switching to Authy.