Connect your device to iTunes or Finder
Connect your device to iTunes using a USB cable and open iTunes (Windows) or Finder (macOS).
Backup your devices
Launch iTunes on Windows and Finder on Mac after your device is detected.
Select the option to back up all your data to your Mac or Windows computer, then click the "Backup Now" button.
When the process ends, you can see if the backup finished successfully. You'll see the date and time of your last backup.Learn how to back up your iPhone, iPad →
Put your device into Recovery Mode
iPhone XS or later: Press and quickly release the Volume Up button. Press and quickly release the Volume Down button. Then, press and hold the Side button until you see the recovery mode screen.
iPad models with Face ID: Press and quickly release the Volume Up button. Press and quickly release the Volume Down button. Press and hold the Top button until your device begins to restart. Continue holding the Top button until your device goes into recovery mode.
Restore your device
iTunes presents you with options to restore or update your device. You’ll need to confirm that you want to set it back to its factory settings by choosing "Restore..." and then iTunes will erase your device.
Activate your device
Once completed, sign in with your Apple ID from iTunes to activate your device.
Restore from your backup in iTunes
When iTunes prompts you to restore all of your information from a previous backup, choose the iOS/iPadOS backup that you created in iTunes before you installed the iOS/iPadOS developer beta. Then select "Continue" and iTunes restore your device.
Restart your device
After your device has restored, it will shut down. Restart your device and follow the onscreen instructions from Setup Assistant.
NOTE: If you have upgraded to macOS Catalina, you can restore your device using Finder. After putting your device into Recovery Mode, select it from Locations in the Finder sidebar.