Wired
With the large number of contacts that we store on our iPhones, it is sometimes necessary to clean up for the sake of clarity. However, for deleted contacts there is no convenient way of recovery; A recycle bin – such as deleted photos – does not exist for deleted contacts. We'll show you how to recover deleted contacts anyway!
requirement
Settings → [My name] → iCloud → Contacts
The trick presented here requires that you have activated iCloud for your contacts. To check this, go to the Settings app at the top of your name and choose the "iCloud" option. Here, the entry "Contacts" must be activated, so the switch is set to green.
Since every iPhone user automatically has 5GB of free iCloud storage, chances are good that you'll be able to recover your deleted contacts.
Restore deleted numbers
To restore a deleted contact, do the following:
- Log in to your Mac or PC with your Apple ID on the icloud.com website.
- Then go to the "Account Settings" button and scroll down to "Advanced".
- Now click on the option "Restore contacts".
- In the contacts archive, select the most recent date before the deletion and press "Restore" to the right.
- Click on "Restore" in the pop-up window to confirm.
Note: All contacts on your devices will be replaced by the selected contacts archive. Your current contacts will be archived, so you can restore them as well.
Source: iPhone Tricks