Hi Ian, I had some issues at first because I hadn't put the slashes after tel: and the button didn't work. It needs to be tel://18005551212, not tel:18005551212. Also, make sure you have 1 before the area code. (That's if you're in the US, I'm not sure how to format it in other countries.) I discovered that the pdf needs to be exported as interactive, not print. I hope this might help, and good luck!
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