We’ll add a custom tab with custom button “Complete and New” for Phone Call entity as shown in the screenshot

This Button allows you to complete the current phone call with activity status “completed” and open the form for new phone call.
To do this you need:
1. Create new solution, add there Phone Call entity and Web Resource “phonecall_ribbon.js” save it and export.
2. Unzip the solution and find the “customizations.xml” file, open it...