Fiso Bison2021 - Customization and Special Features; Navigation Bar Customization

4
Volume Key
 Press to adjust the volume of device.
Home Key
(on the screen)
 Tap to return to Home screen.
Back Key
(on the screen)
 Tap to return to the previous screen.
Fingerprint key
 Press to unlock the phone.
F150 Key
 Press and hold to enter F150 mode.
 Click 5 times to enter SOS mode.
 Note
Multi Task Key and Back Key can be exchanged the layout in Settings -->
Navigation bar. You can customize the navigation bar.
Button customization in settings-->Single click settings to quickly open toolbox tools.