Spirit Theme: How to make Text or an Image "Click to Call"

Hi Support,

I am trying to make an image and a phone number a link to call. I understand that in the URL field it needs to have "tel:" before the number however, it keeps adding "http://" to the front of it. Can you tell me how I make this work?

I'll post a couple screenshots shortly so you can see what i'm talking about. I've also granted support access for this site should you need to take a closer look.

Thanks,
Martiel