If you are running a mobile promotion and have a link to call in to your store you can use the standard link button or through a call to action button link to a phone number.
Using a link
Step 1. Highlight the text and click the standard link button on the hovering black editor
Step 2: Within the protocol drop down menu hit other, then within the URL type tel:YOURNUMBER.
Using a CTA button
Step 1: Add a CTA layer to your overlay from the layers area
Step 2: Then within the URL settings add in the number you would like to call
TAGS: calling from mobile, mobile phone call promotion