Vialer APP
With the Vialer app you call via 4G or WiFi. The only thing you need is a VoIP account linked to your user account. After this, you can immediately start using VoIP calling. The called customer will see your business number on their screen.
Note: to use this app, you need a user account from your hosted telephony provider. Want to know more about the app? Go to https://vialerapp.com