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ever since installing beta 5 yesterday i have not been able to update or download any apps from the app store...getting the same results on wifi and using lte

Why don't you read through the thread? The fix is already posted
 
I was having this same issue, first noticed it when I was trying to update Instagram and then again when I was trying to download podcasts. I plugged my iPhone 5 into the computer and synced an app through iTunes and it sorted itself out. Everything seems to be working fine now.
 
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