Phone/call button

Hello, I’m using an Airtable formula field to create a call and mail column:

In Softr Studio I’m using a button with action open external URL mapped to these columns. The email and Google Map button works, the phone one ends up URL/undefined.

Am I doing something wrong or is there another approach to a call button?

Ricardo,
Is the idea to have the call button launch the dialer on a phone? What would happen if the user were using a computer?

Still no solution to this?

@jfmyron it was open the default caller app, similar to other websites.

@ttalha1000 I couldn’t find a solution and gave up.

I found one here: Creating hyperlinks for display in Softr using formulas - #9 by BeachAthletes but can’t edit that as button.