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My Lumia 1520 is giving me SIM error msg. I've replaced the SIM and stil same msg?

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Windows Central Question

Phone was operating fine 2 minutes prior, then out o the blue... Any suggestions? would be greatly appreciated, as it's a long weekend and I don't have a back up phone.


Sep 4, 2015
My lumia 920 did that regularly for a while. Just had to restart the phone to get it to come back. I took the sim out and cleaned the contacts and the hole the sim card goes in and it stopped doing it.

Hope that helps.