How can I connect to the iTunes/App Store? I tried signing back into my Apple ID, but it won't let me.
The other day, I was trying to upload a photo onto Instagram, but the app kept force closing itself. So I decided to delete the app then try re-downloading it again. When I tried to re-download the app, it said Cannot connect to App Store. So I thought, maybe if I sign out and sign back in to my Apple ID, that'll work, but it didn't. Now my Safari and Weather doesn't work.
iPhone 4, iOS 7.0.4