In the iOS14.5&14.5.1 Upgrade release note mentioned that the problem of "call blocking and identification may not be displayed in setting" has been fixed. However, after updating to iOS 14.5, the original normal [setting - telephone-call blocking and identification] option has disappeared. When re-installing the call blocking app, the option may recover, but it will automatically disappear after a while, becoming very unstable.
How to solve it?
How to solve it?