I've been having some odd behaviour on iOS 9.1 and today is what really set it off for me. I'm currently running iOS 9.1 which isn't jailbroken. I keep getting random texts from Apple saying "Your iCloud Keychain verification code is: X" and I don't have it switched on. I've checked all of my products and the 'iCloud Keychain' is off on all of my devices. Yet I still keep receiving the iCloud Keychain code. Then today I receive a text urging me to change my password and I've never had a popup like this since iOS 2, so is this something new that has been implemented?