Hi there @Intars, welcome to our forum and thanks for your post 😊
Sorry to see you are having issues with your sim. Are you getting any service on the sim at all? What is happening when you have tried using the sim?
Also, can you please try rebooting the handset to see if this helps? If possible can you take the sim out, give it a wipe on the back then pop it back into the phone to see if this helps?
Let us know how you get on with this, we'll be happy to help further.
Regards
Nathan