I have an iPad 1, 3G, 32gig, with AT&T unlimited data & wifi available. A few months ago we left our satellite Internet provider in favor of a 4 G AT&T hotspot at home. I don't use wifi often, but was trying to upgrade a large app that required either wifi connection with my iMac, or a hard wire connect. Tried to wifi connect, but was unable to, so wrestled with hard-wire. Finally got hard-wired for update, but would still like to resurrect wifi. Just updated to Lion on iMac & updated iPad OS & the still aren't talking. Help Please.