Is it necessary for IOS 9.2.1 users to install IOS 9.3.5 patch
Is it necessary that the iphone users who is running IOS 9.2.1 need to install the 9.3.5 security patch update that fixes a major security hole or is it for those user who have already updated to IOS 9.3.4?
iPhone 6s, iOS 9.2.1