To use the virtual keyboard, it must be activated first:
Android 4.4
- Go to Settings > Personal - Language & input > Keyboard & Input Methods
- Click Default (English US - Android Keyboard AOSP)
- Set Hardware - Physical keyboard to OFF
Android 5.0 and 5.1
- Go to Settings > Language & Input > Current Keyboard
- Activate Hardware Show input method
Android 6.0 and above
- Click in an input field
- Click on the virtual keyboard button in the bottom-right corner of the device display
- Choose your input language and activate the Show input method option
