Add your devices to Find My
Once you set up Find My for an iPhone, iPad, iPod touch, Mac, Apple Watch or AirPods, you can use the Find My 
(or Find My iPhone 
) app to locate and protect the device if it ever gets lost or stolen. Activation Lock is also turned on, if the device supports it.
Set up an iPhone, iPad or iPod touch
On your iPhone, iPad or iPod touch, do one of the following:
iOS 13, iPadOS 13 or later: go to Settings > [your name] > Find My.
iOS 12 or earlier: go to Settings > [your name] > iCloud > Find My iPhone.
If you are asked to sign in, enter your Apple ID. If you do not have one, tap “Don’t have an Apple ID or forgot it?” and follow the instructions.
If Find My [device] is turned off, turn it on.
Turn on any of the following:
Find My network (or Enable Offline Finding): for a device with iOS 13, iPadOS 13 or later, the Find My network helps you find your device even if it is not connected to a Wi-Fi or mobile network.
Send Last Location: if your device gets lost or stolen and its battery charge level becomes critically low, its location is sent to Apple automatically. When you use Find My (or Find My iPhone) to locate that device, you see where it was before its battery ran out of charge.
Tip: You can rename an iPhone, iPad or iPod touch to easily tell it apart from your other devices. See the Apple Support article Change the name of your iPhone, iPad or iPod using your computer.
Set up a Mac
On your Mac, choose Apple menu
> System Preferences, then do one of the following:macOS 10.15 or later: click Apple ID, then click iCloud.
macOS 10.14 or earlier: click iCloud.
If you are asked to sign in, enter your Apple ID. If you do not have one, click Create Apple ID, then follow the instructions.
If Find My Mac is turned off, select it to turn it on.
When you select Find My Mac on a Mac with macOS 10.15 or later, the Find My network is turned on. With the Find My network, you can locate your Mac using Bluetooth when your Mac is not connected to Wi-Fi. To turn off this option, click Options, then click Turn Off next to Find My network (or Offline Finding.)
Tip: You can rename a Mac to easily tell it apart from your other devices. See Change your computer’s name or local hostname on Mac in the macOS User Guide.
Set up an Apple Watch or AirPods
Apple Watch: pair your watch with an iPhone on which you are signed in with your Apple ID.
AirPods: pair your AirPods with an iPhone, iPad or iPod touch on which you are signed in with your Apple ID.
Tip: You can rename Apple Watch or AirPods to easily tell them apart from your other devices. See the Apple Support articles Change the name of your Apple Watch and Adjust the settings of your AirPods.
Add a family member’s device to Find My
If you are part of a Family Sharing group, you can use Find My (or Find My iPhone) to help find and protect any family member’s device. Their devices appear below yours in the Devices list.
Each family member must set up their devices to share their locations with other family members. See the Apple Support article Share your location with your family.
You cannot add friends’ devices to your Devices list in Find My. Friends who lose a device can go to icloud.com/find and sign in with their Apple ID. See How to sign in to Find My iPhone on iCloud.com.
About Activation Lock
Activation Lock helps prevent anyone else from using your device if it ever gets lost or stolen. When you turn on Find My [device] on an iPhone, iPad, iPod touch, Mac or Apple Watch, Activation Lock is turned on automatically.
With Activation Lock, your Apple ID and password are required before anyone can do the following:
Turn off the Find My [device] setting on your device.
Sign out of iCloud on your device.
Erase and reactivate your device
If you lose your device and remotely erase it using Find My (or Find My iPhone), Activation Lock remains on. Your Apple ID and password are required to reactivate the device. If you reset your device and erase all content and settings, Activation Lock is turned off.
For a Mac, Activation Lock is available for models with a T2 Security chip that have macOS 10.15 or later installed. For more information about Activation Lock, see the Apple Support articles Activation Lock for iPhone, iPad, and iPod touch, About Activation Lock on your Mac and About Activation Lock on your Apple Watch.
Note: You should set up multiple methods of verifying your identity in case one of your devices gets lost or stolen. See the Apple Support article Two-factor authentication for Apple ID.