iPad 2 Bricked after Update

Updated to 9.3 now the iPad is bricked. I was able to plug into my computer and iTunes to do a restore but after a complete restore I get a popup window stating “ipad could not be activated because the activation information could not be obtained from the device” then says to make sure simm card is in place – what simm card – this is not a phone. Did the restore 3 times with the same results. Any help is much appreciated.