Samsung Galaxy Tab A

Find "Voice call"

Press Phone.

Find "Voice call"

Press the keypad icon.

Find "Voice call"

Press MORE.

Find "Voice call"

Press Settings.

Find "Voice call"

Press More settings.
After a moment the current settings are displayed.

Find "Voice call"

Press Call forwarding.

Find "Voice call"

Press Voice call.

Cancel all diverts

The current settings are displayed.

Cancel all diverts

Press one of the following options:
Always forward

Cancel all diverts

Forward when busy

Cancel all diverts

Forward when unanswered

Cancel all diverts

Forward when unreachable

Cancel all diverts

Press DISABLE.
Repeat until all diverts have been cancelled.

Return to the home screen

Press the Home key to return to the home screen.