If the physical buttons of your phone can not work properly, Back Button can continue work your phone with simulating same as system button.
=> Set position of button where your want.
the back button can be set vertically or horizontally any where your want.
=> Custom icon
You can set the button background color, and the icon. and you can also make the button with transparency background.
=> Vertical and Horizontal Support
Thank you for your download, please give feedback for better performance.
– Added Android P rotation
– Improve performance
– Minor bug fixed