I think my sim card might be damaged. I am in France at the moment so I recently changed my sim card to use a French phone number. When I tried to use my Canadian phone number again, I couldn’t get any service.
I already have the international roaming access Add-on and it was working well before I changed my sim card.
I also tried all of these : https://support.apple.com/en-ca/HT201415
Thank you for your help!