Also make sure you activate a plan. I had the same issue when I put in the brand new SIM but then I activated the card on the PM website and it worked. Follow the steps on the "Get Started" page to activate it!
You can check your phone compatibility on this page: https://www.publicmobile.ca/en/bc/get-startedJust search Oukitel C17 and it will let you know if it's compatible or not. Also, if you want to configure your data, here are the APN settings (search ...
