1. Windows Central Question's Avatar
    As off last night my lumia 1320 started giving me the following error message - "The SIM card is missing or invalid . You can still make emergency calls if your mobile operator supports this. What could the cause of this error be?
    01-13-2016 01:58 AM
  2. Laura Knotek's Avatar
    Hi and welcome to WindowsCentral.

    Have you tried removing your SIM and cleaning its contacts with a pencil eraser prior to reinserting it?

    Does your SIM work in another phone?

    You might need a new SIM from your carrier.
    01-13-2016 02:02 AM

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