AT&T grandfathering unlimited data plans on iPad 2

Engadget has confirmed that AT&T will allow iPad 2 users who purchased an unlimited data plan for the original iPad last year to continue using their plan with the iPad 2. When the iPad Wi-Fi + 3G first launched in the U.S. last spring, the carrier initially offered an unlimited data option for $30/month, however a few weeks later the carrier revised its plan structure replacing the unlimited iPad data plan with a $25 for 2GB per month option. The iPad 2 goes on sale in the U.S. this Friday and it is not yet known whether existing iPad Wi-Fi + 3G users will need to go through an activation process with AT&T to transfer their plan to the new device or can simply move over their existing micro-SIM card.