Google provides the individual smartphone manufacturers BGG a standard version of Android. In this version, you will find various functions for barrier-free use under the operating aids, which can be subdivided into:
The speech output in the Android system is called "TalkBack". This feature provides information about alerts and notifications on the smartphone. TalkBack is activated in the device settings or by pressing both volume buttons for three seconds.
If you only want individual sections or elements to be read aloud or picture elements to be described, there is the "Read aloud" function. By tapping, a single element is selected and by swiping, several objects are selected. If you now press the play button, all selections are read out one after the other. You can pause, play, fast-forward or rewind the reading and adjust the speaking speed.
As an alternative to touchscreen operation, you can also operate the smartphone using external switches, keyboards or mice. These devices are connected to the smartphone via USB cable or wirelessly via Bluetooth. One or more keys on the keyboard can be assigned to an action. With switch horn, the individual selection items on the smartphone light up in sequence and are selected by pressing the switch.
Alternatively, a Braille display can be connected via Bluetooth. This can be combined BGG "TalkBack", which allows texts to be output verbally or in Braille. The smartphone can also be hornled via a Braille display, but only BGG certain models. To use the function, an app must be downloaded from the store. An overview and instructions can be found on the manufacturer's site.
For screen customization, you can change the display, font size, and contrast and color options. The adjustment of the font and display is only applicable from Android 7.0, the color and contrast settings already from version Android 5.0. In the case of a color correction, a red-green vision impairment and a blue-yellow vision impairment can be compensated.
To enlarge the screen in the meantime, there are two variants. By tapping the screen three times, the corresponding section is zoomed in. You can now move the zoomed-in window and adjust the zoom level by pulling your fingers together or apart. If you tap three times again, the zoom is ended. Alternatively, zooming can also be selected via the operating aid symbol. Navigation in the zoom window works in the same way.
Subtitles can also be activated. These are individually customizable in language, text size, style, color and background. Voice horn is only possible in English so far and is still in the testing process.