Are there any travelling add-ons for calls?

Hi Andy

No you cannot have addon for the calls outside Canada and US

However, as suggested by Fizz you can use VoIP app ( I like fongo), and therefore buy data addons or use wifi

In the meantime, probably you will be better off to buy a local SIM card

This is the Fizz’s text

Important : You will not be able to make calls while roaming outside your Canada or the United States.
Roaming calls (incoming or outgoing) will be available at a later time. We will update this FAQ when we have a firm date.
In the meantime, you will be able to use data, and send/receive texts when you travel outside your coverage zone. To make and receive calls, you can use messaging apps such as WhatsApp or Messenger.

Source: https://fizz.ca/en/faq/im-travelling-outside-my-coverage-zone-what-are-my-roaming-options