The option to set up Find My is part of the initial iPhone setup process. You may have enabled it then. If you didn't, follow these steps to turn it on. In earlier ...
You can turn off the Find My feature on your iPhone from the phone's Settings app, or via the iCloud website.
Apple announced the new iPhone 17 lineup and the new iPhone Air at its "awe dropping" event on Sept. 9, and you can buy those devices now. But before you upgrade any of those devices, Apple suggests ...