If you can't update or restore your iPhone, iPad, or... - Apple Support
https://support.apple.com/en-us/HT201263
You can put your iOS or iPadOS device in recovery mode, then restore it using your computer. In these situations, you might need to use recovery mode to restore your device
How to Use Recovery Mode to Fix Your Android... | Digital Trends
https://www.digitaltrends.com/mobile/use-recovery-mode-android/
Recovery mode will allow you to reboot your system and get a fresh start without any viruses or other issues that were potentially causing you trouble.
How to Enter and Use Recovery Mode Android
https://www.android-recovery.net/android-recovery-mode.html
Android Recovery Mode is a feature of Android Device. You don't need to install some program on your phone or connect to Recovery mode refers to the bootable partition in Android phone, in which the...