Hi all, on my iPhone 4S, I used to let my friends use their Apple ID to check balances and purchases and other things; I NEVER knew their password. However, now, with any interaction with the App Store, it comes up with 'Enter Apple ID password for firstname.lastname@example.org'. I click cancel. Then almost the same thing comes up: 'Enter Apple ID password for email@example.com'. I click cancel. Then it comes up again for some other Apple ID. This will happen about five times in total. How can I delete these Apple IDs from the phone's memory? Thanks!