my ipad useless after upgrade to ios7
I upgraded my ipad 3 with ios7 3 days ago. Then, I got a message from ipad that I need to suyn with iTunes. I sync with my iTunes so many times, buy I cannot get my ipad 3 working again. I always got the error from iTunes "There was a problem downloading the software for the ipad "ipad". The network connection timed out". Then, I asked apple suport staff, he instructed me holding two keys, then one key afterward. It does NOT work. The same error message. iPad 3 is useless now. so, what next? anyone can help???