MX4 Pro (Global) user here. The first firmware of the said unit has an option to turnoff back tap at the home button. Now I am using the new firmware, Flyme 5. How or can I ask for the next update that you will have an option for disabling back tap at the home button in Accesibility tab. Bc when typing in keyboard or any options at the screen near home button, I usually tap the home button and its annoying. Smart Touch is more useful for back tap. Thanks