Using Unlimited Ipad2 3G SIM in new iPad 3?

i have ipad 2 at&t unlimited 3g sim in it.

think 3g sim work in new ipad 3, or new sim needed work 4g lte?

opinions sought ... understand at&t hasn't announced plans yet.

 

no, not. at&t going require 4g sim. somewhere else read grandfathered in. sure hope so.

 

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