Great, the tip of signing out and signing in to Appstore worked after I was crazy why my iPhone 6+ did not connect to the App Store. Thanks for the tip. So go to Settings -> iTunes &App Store -> clike the Apple ID and sign out and sign in again with your password and it just worked fine.
Thanks for the tip, the forum really helped than going thru round and round with the lousy apple online support.
I say this since I have had a problem to 'Backup' or 'Restore' or 'Sync', none of this worked with my iPhone 5 when after I updated to IOS 8.0.1 when I wanted to restore that data to my iPhone 6+, for two months there is an open support with Apple online support the guys talk so sweetly on the phone and on the chat and as if there sooo... much committed but never call back to settle the issue after putting it off to check with engineering team. The error says 'Cannot backup due to an error', that is all. I finally gave up and setup my iPhone 6+ as a new phone and trying to recover data from one App to other, it is really painful.
I really gave up hope Apple is the greatest company with this experience till today the bug is not resolved.