It could also have something to do with your account settings. If you forgot iTunes backup password, check this article to help you unlock iTunes backup without factory restore. Having seen why this happens, let us now try to fix this issue. Solution 1: Try to Reset Settings on Your iDevice . You can attempt resetting the settings on your iPhone. Get the best of Starbucks® Rewards right at your fingertips. Use our mobile app to order ahead and pay at participating locations or to track the Stars and Rewards you’ve earned—whether you’ve paid with cash, credit card or Starbucks Card. Find stores, redeem offers and so much more.
Connect the iPhone to iTunes. If a carrier update is available, you typically see a message as soon as iTunes recognizes the iPhone. Select Download and Update in the message window to update the iPhone.