Here's How to Delete Single & Multiple Contacts on Your iPhone
You should delete your contacts from time to time, whether you have people you no longer talk to or simply because your phone has been duplicating contacts or syncing contacts via your iCloud account.
After all, having an iPhone that is cluttered with outdated or pointless information can be frustrating.
Luckily, deleting contacts is relatively easy to do on the iPhone, even though you cannot delete multiple contacts at one go on your iPhone directly. In this guide, we will go through various methods you can try whether you want to delete multiple contacts in bulk or delete specific contacts.
First off, no, you cannot delete multiple contacts at once. If you go into the contacts app for iOS, you will not see anything that will let you just delete multiple contacts.
There are ways to get around this, though. Start by wiping all the iCloud contacts that are synced from other devices. If you have many contacts that have synced to your phone, doing this is the easiest way to get rid of all those extra contacts that you do not need.
You can also delete any third-party contacts and stop them from syncing with your device. This means stopping syncing that comes with services like Gmail, AOL, Outlook, or other types of third-party services.