Disabled users are able to customize accessibility options in order to make using an Android device easier for them.
Accessibility options on Android 4.0
Disabled users on Android can customize their devices to help improve the smartphone experiences. To change the accessibility options, open the Settings app and scroll to the bottom. There you'll find Accessibility. Tap on it.
There's a long list of options you can enable. TalkBack is a great place to start. Once activated, your device will literally speak every action the phone takes to you. For example, if your screen turns off, you'll hear "Screen off" followed by the ringer volume your device is currently set to.
You can also have the system font increase in size, enable the power button to end calls, auto-rotate the screen, and even set the touch and hold delay.
When you first select TalkBack from the accessibility menu, you'll be prompted to turn it on. As we saw when enabling notification apps, you'll then see a pretty heavily worded warning about TalkBack being able to access all of your vital information. You'll need to accept the warning before proceeding.
After accepting the warning, tap on Settings at the bottom of the screen to continue setting up TalkBack.
TalkBack's settings allow you to customize what actions and alerts are read to you. You can even disable speech when the screen is turned off. If you prefer not to have vibration alerts along with the speech, uncheck the box next to vibration feedback.
There are also some third-party apps that help with customizing the accessibility of a device should the default options in Android leave you wanting more.