There are few reasons you may meet that can cause iPhone contacts missing or disappeared:
Many iPhone users have reported and informed about this issue and I’ve personally had this issue previously. Fortunately, it is easy to bring back the iPhone missing contacts right now, and here is how you should do it
Step 1: Go to Settings > iCloud.
Step 2: Turn off the toggle for Contacts. If you get a prompt for removing the previously synced contacts, choose Delete from My iPhone (this will remove the contacts just from your iPhone and not from iCloud).
Step 3: Now force reboot your iPhone:
Step 4: Go back to Settings > iCloud and toggle on Contacts.
Step 1: Go to Settings > iCloud.
Step 2: Scroll to the bottom and click on Sign Out.
Step 3: Now Sign-in to your iCloud account.
Step 4: Make sure that the toggle for Contacts is turned on.
If you took a backup of your iPhone recently in iTunes before this problem appeared, then you can restore from that backup to get back the missing contacts from iPhone.
Step 1: Connect your iPhone to your computer and open iTunes.
Step 2: Click on the device icon to open the Summary page.
Step 3: Tap on Restore Backup.
Step 4: Choose the most recent backup of your iPhone and then tap on Restore.
Step 1: Open the Phone app.
Step 2: Go to the Contacts tab.
Step 3: Tap on Groups in the top left corner.
Step 4: Deselect the All iCloud option.
Step 5: Now click on All [iPhone Name] to select it.
Step 6: Click on Done in the Top Right Corner to save the settings.
In the contacts list, you will now see a list of all the contacts saved on your iPhone. Find the ones that are missing and add them to your contacts. This will sync it with iCloud.
Step 1: Go to Settings > General > Reset > Reset Network Settings.
Step 2: Enter your passcode when requested.
Step 3: You should see a warning message that this action will delete all your network settings. Choose “Reset Network Settings” to continue.
Step 4: Check to see if your contacts disappeared from iPhone are back
These are the 05 methods for getting back the contacts that are absent on your iPhone. It can be frustrating when your important contacts disappear all of a sudden out of nowhere, so we suggest that you regularly take backups of your iPhone in iTunes to prevent losing your important data.
Ever used another method of restoring your missing contacts? Let us know in the comments below.
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