Click-to-Call

You need to use the html tag:

tel:+1.800.000.0000

and the person must be on a mobile or have a call plugin installed for that to really work.

But due to the tracking code Marketo adds to the end of all links, this breaks the click-to-call functionality as it adds more characters for the phone to dial.

It's possible to circumvent this issue by not tracking those links. But is there a way to have functional click-to-call links while also being able to track those clicks?

How do we use this html code if we are using a token phone number?
 

It would look like this:
<a href="tel:+{{lead.Phone Number:default=edit me}}">{{lead.Phone Number:default=edit me}}</a>
The "edit me" parts are for a default value in case there's no phone number for the lead.

But again, you'll have to make sure to remove tracking from that link so that Marketo doesn't add its tracking token to the URL. Otherwise, that'll become part of the phone number to be dialed.