iPhone is slow if updated to iOS 11.2.2?
in order to protect the previous user from the vulnerability of meltdown and specter vulnerabilities announced last week, apple has officially released ios 11.2.2 version but itiPhone X, iPhone 8 may slow down after upgrading to iOS 12.1
apple has quietly added performance management - managing its performance on iphone 8, 8 plus and iphone x models.