Taking your data plan to a new iPad

New York Times:

In the case of the iPad, you might be able to transfer your plan from the old tablet to the new one right in the settings, without having to fuss around with the hardware.

After you have gone through Apple’s sequence of steps for setting up a new iPad out of the box, tap open the Settings app on the home screen. On the Settings screen, choose Cellular Data on the left side and Set Up Cellular Data on the right. If your previous iPad uses a compatible SIM (subscriber identity module), you should see an option to transfer your existing plan over to the new iPad through your wireless carrier’s network. You need to know the user name and password for your account with the carrier to complete the move and activation process.

Tuck this one away for the next time you upgrade your iPad.