Its been four months i got activated my fido sim and every thing was going good. But since yesterday I am facing this problem. It is notifying me about unregistered sim. I have also removed the sim twice and restarted my mobile several times but nothing is happening. Can you guys please help me asap.
Welcome to the Fido community!
Do you have access to another phone that you can try the SIM to see if it works? It could be that the SIM is bad and would need to be replaced.