I have the same problem and I tried the following
restoring the iPad and restoring from backup than it opens the app/iTunes store a couple of times than suddenly it's not working again
restoring the iPad and don't restore from backup the same thing happens .. working than not working !
changing from WiFi to 3G network connection, changing WiFi network, disabling firewall (on my laptop) even though I don't think any sittings in the laptop has nothing to do with iPad functioning or not !!
signing out of the account from the sittings and signing in again
and the strangest thing was when I view my account a white page appear ! (looks like basic HTML page)
I also contacted apple support through email and they just direct me to phone numbers or some articles in their support site which I already read !
more over I tried connecting to the store through upgrading some apps I already have
also opening the store through safari and then get directed to the app store but also didn't work
and the sad thing is not having an official support center in the middle east ! 😟
some resellers fix only hardware problems not software problems.
I don't know what to do !! this is really frustrating ! there's no use of iPad if I can't connect to app store and purchase apps ( at least for me 😢)
the only solution I didn't try is downgrading my iOS which make no sense because I should be able to upgrade without any problems and if I downgrade I would I have to don't upgrade any more !! doesn't make sense !
Message was edited by: Banan