My My s 7 Sagem no longer displays the phone contacts I stored in my SIM card. What might be wrong?

Question

I have many phone numbers stored in my telephone. The telephone is My S-7 sagem. When I first installed my SIM card, it was possible for me to access the telephone numbers I stored in the SIM card. But a few days ago, I found I could no longer access these telephone numbers. When I press the "contacts" button, what opens is a blank page. I do not know what the problem is.

Answer 1

first off this is for landlines and not cell phones. second go to your cell phone company and see if they can help you out