Hello @user021666 ,
Can you elaborate a bit? We have several different areas to add phone numbers, most notably in My Settings, or in your footer area of emails as part of the physical address. Or if you have multiple phone numbers to include in your emails, you can construct your own footer with a Text Block. Or you can place an order for our coding team to create a Branded Footer, which replaces the legally-required plain-text footer with an equally compliant, custom-designed footer for a one-time charge of $99.