Fix 1: Delete Contact Using the Same App Used to Create It

One of the most common reasons you may encounter the “Not all contacts were deleted” error on your iPhone is if you have created a contact using instant messaging apps like WhatsApp. Since these are read-only contacts, you may have trouble deleting them using the Contacts app.

To delete such read-only contacts from your iPhone, you need to use the same app you used to add the contact. For example, if you cannot delete a contact created using WhatsApp, follow these steps to remove it.

Step 1: Launch WhatsApp on your iPhone and navigate to the contact you want to delete. Tap the contact name at the top.

Step 2: Tap the Edit option at the top-right corner and tap the Delete Contact option.

Fix 2: Turn Off Siri’s Contact Suggestions

Siri’s contact suggestions feature may sometimes prevent your iPhone from deleting certain contacts or displaying previously deleted contacts. To avoid such issues, you should turn off Siri contact suggestions on your iPhone using these steps:

Step 1: Open the Settings app and scroll down to tap on Siri & Search.

Step 2: Tap on Contacts and turn off the toggle next to Show Contact Suggesions.

Fix 3: Disable and Re-Enable iCloud Sync

Sync issues with your iCloud account can also prevent you from editing or removing contacts on your iPhone. You can try disabling and re-enabling iCloud contacts sync on your iPhone to see if that helps.

Step 1: Open the Settings app and tap on your name at the top. Then, tap on iCloud and select Show All.

Step 2: Turn off the toggle next to Contacts. Wait for a few seconds, and then turn the toggle back on.

Fix 4: Check Content & Privacy Restrictions

You may be encountering the “Not all contacts were deleted” error due to content restrictions set on your iPhone. You need to review these settings to ensure contact changes aren’t restricted to your iPhone.

Step 1: Open the Settings app, tap on Screen Time, and select Content & Privacy Restrictions from the following menu.

Step 2: Tap on Contacts and select Allow Changes.

Try deleting contacts after this and see if you get any errors.

Fix 5: Use iCloud in a Browser to Delete the Contact

Lastly, if none of the above tips work, you can delete contacts by accessing your iCloud account in a web browser. Here are the steps for the same.

Step 1: Open up a web browser on your computer and visit iCloud. Sign in to your account if you haven’t already.

Step 2: Click the apps icon in the top-right corner and select Contacts.

Step 3: Hold down the Control (Windows) or Command (Mac) key on your keyboard and select the contacts you want to delete. Then, click the Delete Contacts option in the right pane.

Step 4: Click the Delete button to confirm.

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