When you frequently use your mobile phone, tablet, and/or computer to sign-in to your Facebook account, Facebook starts treating them as ‘Known Devices’.
If you try to use a new device to log onto your Facebook account, Facebook prompts you to provide an answer to the security question or similar task in order to prove your identify. As soon as you authenticate yourself and prove your identity, the new device is also added to the ‘Known Devices’ list, and you can then use the device to sign-in to your Facebook account without any issues.
If you wish to view the list of the ‘Known Devices’ that are saved in your Facebook profile, you must go to your Facebook account settings either from your laptop/desktop computer, or your Android smartphone.
Here is how:
- ■Turn on your Android phone.
■Tap the Menu button to go to the apps list.
■Locate and tap the Facebook icon.
■To sign-in to your Facebook account, provide the correct login credentials in the appropriate fields, and tap the Log In button.
■Once the News Feed page opens up, tap the More button (button with three horizontal lines) from the top-right corner of the interface.
■On the More interface, tap the Account Settings option from the HELP & SETTINGS section.
■From the Settings page, tap Security option.
■On the Security Settings window that opens up, tap the Recognized Devices option.
■On the Manage Recognized Devices interface, you can see the list of all the known devices.
Note: If you want, from this interface, you can remove any ‘Known Device’ from the list by tapping the X button representing the unwanted device.