Encryption stores your data in a form that can be read only when your phone or tablet is unlocked. Unlocking your encrypted device decrypts your data. Encryption can add protection in case your device is stolen. The following information provides ways to set up encryption on iOS, Android, and Windows mobile devices.
Encryption is automatically enabled when passcode or Touch/Face ID is set. More information can be found in the following Apple support resources:
Using a passcode with your iPhone, iPad, or iPod touch
Using Face ID on your iPhone or iPad Pro
All Pixel phones are encrypted by default, as well as Nexus 5X, Nexus 6P, Nexus 6, and Nexus 9 devices. You can choose to encrypt Nexus 4, Nexus 5, Nexus 7, and Nexus 10 devices. More information can be found in the following Android support resource:
Pixel Phone Help - Encrypt your data
More information can be found in the following Windows Mobile support resources:
Microsoft Support - Turn on Device Encryption
How to Enable Device Encryption on a Phone with Windows 10 Mobile