Unlike device encryption, which required you wipe the phone to remove it, SD card encryption can easily be reversed in the Settings menu.

To do so, simply go to Settings, then Security and then Encrypt Phone. That’s literally all you need to do in order to ensure that your data isn’t stolen when selling an Android device.

iPhones, Android devices held back by encryption limitations Defense organizations explore whether commercial handheld devices can provide enough encryption to meet security requirements.