If you notice a persistent green square or other on-screen accessibility features on your tablet, you or customer may have accidentally activated the "TalkBack" feature. TalkBack is an accessibility option on Android devices that reads aloud the content displayed on your screen and enables users to interact with their device through gestures and spoken feedback. The green square you see is a visual indicator that TalkBack is currently active.

When TalkBack is enabled, users must interact with their device using specific gestures, such as double-tapping to select items, rather than the usual tap-and-swipe actions. This green box may prevent you from clicking on anything else or entering a phone number, as it moves around whenever you try to interact with another element.

To disable TalkBack on your tablet, please follow these detailed steps:

1. Open the Settings App: Locate the Settings icon on your home screen or app drawer and tap on it to open the Settings menu.

2. Navigate to Accessibility: In the Settings menu, scroll down or use the search bar at the top to find the “Accessibility” option. Tap on it to access the accessibility settings.

3. Select TalkBack: Within the Accessibility menu, look for “TalkBack.” It may be listed under a section dedicated to vision or screen reading options. Tap on TalkBack to open its settings.

4. Turn Off TalkBack: You will see a toggle switch or an option to turn TalkBack off. Make sure this switch is set to the off position. You might be prompted to confirm your choice, so be sure to accept if necessary.

Following these steps will effectively disable the TalkBack feature on your tablet.