When using the “Lock” feature on Android Device Manger, you can reset the password of the Note 5 from any computer. 1  Go to the Android Device Manager from a computer. 2  Find your Galaxy Note 5 on the screen.3  Enable “Lock & Erase” feature. 4  Then follow the given steps on the page to lock your phone.5  Set a temporary password.ow To Factory Reset Samsung Galaxy Note 5. It’s important to note that before you go to factory reset a Galaxy Note 5, users should back up all files and information to prevent any data from being lost. Read this step by step guide on how to factory reset a Galaxy Note 5.