iCloud: Erase your device
If your iOS device, Apple Watch, or Mac is lost or stolen, you can erase it if you set up Find My iPhone on the device before it was lost. If Find My iPhone isn't enabled on your missing device, see the Apple Support article If your iPhone, iPad, or iPod touch is lost or stolen. If you have Family Sharing set up, you can erase your family members’ devices, too. For more information, see the Apple Support article Family Sharing.
When you erase a device, Find My iPhone and Activation Lock are also turned off.
Important: Before you erase your device, try to locate it or play a sound on it. After you erase it, you can’t use Find My iPhone to do either. You can still locate your Mac or Apple Watch if it’s near a previously used Wi-Fi network.
Erase your device or a family member’s device
If you don’t see Find My iPhone on iCloud.com, your account just has access to iCloud web-only features. To gain access to Find My iPhone and other iCloud features, set up iCloud on your iOS device or Mac.
Click All Devices, then select the device you want to erase.
In the device’s Info window, click Erase [device].
An iOS device or Apple Watch: Enter your Apple ID password or your family member’s Apple ID password. If the device you’re erasing has iOS 8 or later, enter a phone number and message.
A Mac: Enter your Apple ID password or your family member’s Apple ID password. Enter a passcode to lock the Mac (you need to use the passcode to unlock it), then enter a message.
After you set a device to erase
If your device is online, the remote erase begins. A confirmation email is sent to your Apple ID email address.
If your device is offline, the remote erase begins the next time it’s online.
If you erase then find your iOS device, you can restore the information on the device using iCloud Backup (if backup was turned on before you erased it) or iTunes. For more information, see iCloud storage and backup overview, or the “Safety, handling, and support” section of the iOS user guide for iPhone, iPad, or iPod touch. For a device that doesn’t use the latest iOS version, get the user guide for iPhone, iPad, or iPod touch from the Apple Support manuals website.
If you erase then find your Apple Watch, you can restore the information on it. For more information, see Restore Apple Watch from a backup in the Apple Watch User Guide.
If you erase then find your Mac, you can restore the information on the Mac using a Time Machine backup, if you have one. For more information, see the Apple Support article Recover your entire system. If you set an EFI firmware password on your Mac before it was lost, then erase it and later find it, you may need to take your Mac to an authorized repair center to unlock it before you can use it again.
Any credit or debit cards set up for Apple Pay on your device are removed from your device, even if it’s offline. Apple Pay is also disabled for your device. For more information, see the Apple Support articles Use Wallet on your iPhone or iPod touch and Use Touch ID on MacBook Pro.
Note: If you don’t expect to find your iPhone or iPad (Wi-Fi + cellular models), contact your wireless service provider to suspend service so you aren’t responsible for phone calls or other charges.