iOS 9.1 glitch - 'restrictions' and passcode mysteriously activated eliminating icons and access to apps
i recently noticed that I was missing app icons from my iPhone 5, starting with the App Store icon. (Siri: 'You do not have an app called App Store. Would you like me to find it in the App Store?'). After restarting phone I noticed that another icon had gone missing (and possibly more), but while trying to troubleshoot I noticed that 'restrictions', including a passcode, was turned on. I have never activated 'restrictions' nor set a passcode for this function. Advice online suggested the icons/apps were turned off in the 'restrictions' function. My attempts to guess the passcode were unfruitful. I finally gave up and contacted Apple support where I learned the only way to fix the problem was to do a complete reset of the phone.
iPhone 5, iOS 9.1, null