iPhone Contacts Disappeared? How to Fix Missing Phone Contacts in iOS
A strange bug that continues to persist in iOS for iPhone mysteriously causes all phone contacts to suddenly disappear from the Phone app on the device. Most users will never experience the missing contacts bug, but it can be disconcerting if encountered.
This missing contacts bug is not subtle and seems to happen at random, with the Phone app losing the “Favorites” and “Contacts” tabs, as well as the Phone app losing all identifying contact information for existing phone numbers, making every phone number in the recents list appear as unrecognized with no attached contact name, picture, or any other details.