If you are using Google Chrome - you can try the extension found here, amazing work by the late Joe Cloudwalker.
If you've never even had a script before, let's get you the first thing: Tampermonkey
Once you have Tampermonkey installed (or if you already do), you'll click on the icon at the top right of your browser window, select 'Dashboard'. This will show you any scripts you have installed. Click the plus sign or anything else that says Add or Create New (there SHOULD be a plus sign).
On line 44 you can choose your default calling option. Mine is set to 121, Gossip on the phone. You can change it to whatever you want, you can see what the options are in line 88-95.
You can also swap this manually in the game in your address book.