Original sentence: The two buttons labelled by white horizontal lines, known as 'hotkeys' or 'soft keys' perform the function of making binary decisions, labelled on the phone's display
Edited sentence: (The joystick has long been a contentious issue with some reviewers finding it hard to use and highly susceptible to damage over time, in as much as it will cease to function.) The two buttons labelled by white horizontal lines, known as 'hotkeys' or 'soft keys' perform the function of making binary decisions, labelled on the phone's display