Absolutely nothing. Our click to call is a global service, so any user that has access to your website, wherever they happen to be located, can call using the Click to Call button in the same way as someone who is in your region. This is a very big advantage as it offers your users a universal and free way to contact your company.
You can manage the Click to Call buttons that you add to your site the same way you manage other buttons, such as changing the language of your site. The Click to Call button is completely customizable and can be configured to let you know the origin of each call.