Need help changing default phone app from Messages

[JohnQN]

Whenever I'm in a text message and click the phone icon on the top right corner to call the person, it opens up the Viber app. I do not want to use Viber, how do I change it so it bring up the phone app instead?

 

[PitCarver]

Have you tried clearing any default settings in the Viber app?

 

[svim]

Try going into the Apps menu in your Settings, find and open the Viber app entry, and in the Open by default option tap on the 'Clear Defaults' button. That should clear the Viber app from being the default phone call app. If you then launch the Phone app and there's a prompt to make it the default be sure to follow through accordingly.