The TalkBack screen reader gives you spoken feedback and notifications. Android phones have a function called TalkBack that speaks out loud what you tap, select, and activate on the screen.
Option 1. Press both volume keys.
You can use volume key shortcut to turn TalkBack Off.
1. On the side of your phone, find both volume keys.
2. Press and hold the volume keys for 3 seconds.
3. To confirm that you want to turn TalkBack on or off, press both volume keys again for 3 seconds.
NB. To permanently turn off the volume key shortcut, go to Settings > Accessibility >TalkBack. Then turn "TalkBack shortcut" to OFF.
Option 2. With Google Assistant.
1. In the setup wizard or in settings, after you turn on Google Assistant, say "Hey Google"2. Say " Turn OFF TalkBack"