I cannot make any calls

Hi Xavier,
Please turn off and turn your phone back on. it's always the most important.
If you are in your coverage area, then I'd suggest you visit this link where you can do all the technical testing by youself: https://fizz.ca/en/faq/I-cant-make-any-calls-on-my-phone-why
If it's still not working, then I'd suggest you contact Fizz by chat so you can chat with an agent.
Hope it's fixed soon!