If your phone number on your website is a graphic, there is some re-tooling you will need to do to get it to swap with the CTM code.
Our primary recommendation is to change the format of the phone number so that it is NOT in an image. This is the most straightforward solution.
You will then need to place your custom code in the tracking script area of the Tracking Code page, found within Numbers → Tracking Code → Custom Tracking Code.
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