Identifiable by the model number S7562, the Galaxy S Duos is a dual sim card smartphone made by Samsung.

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My phone restarted in different times .that time I can't get any calls

i get a msg before restarting "your simcard not valid

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1 Answer

Take it to your service provider and ask they might know why it is doing that that is really weird. I have never heard of this happening. Sorry I could not help!

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Muhammed salim pc will be eternally grateful.
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