Use Find My iPhone on iCloud.com on your iPhone
Find My iPhone on iCloud.com helps you locate your Apple devices using information stored in iCloud
What can you do in Find My iPhone on iCloud.com on your iPhone?
Sign in: view the location of your devices by signing in with your Apple ID and password, even if you have lost your trusted device. See How to sign in to Find My iPhone on iCloud.com.
Locate devices: see the location of your iPhone, iPad, iPod touch, Mac, Apple Watch or AirPods on a map.
Play a sound: play a sound on a lost device to help you find it.
Mark a device as lost: use Lost Mode to protect a lost device so that others cannot access your personal information. Display a custom message on the device’s screen, telling people that the device is lost or how to find you. Once you find the device, you can turn off Lost Mode.
Erase a device: remotely erase all your personal information from the device. Activation Lock remains on to protect the device.
Remove a device from your account: If you are no longer using a device, or you sold it or gave it away, remove it from your account so it does not appear in Find My iPhone.
If you are using another feature on iCloud.com, you can switch to Find My iPhone by tapping the feature’s name in the top left-hand corner of the iCloud.com window.
If you do not see Find My iPhone on iCloud.com on your iPhone, your account just has access to iCloud web-only features. To use Find My iPhone and other features on iCloud.com, set up iCloud on your iPhone, iPad, iPod touch or Mac.