This solution applies to both Nokia Asha 202 and Nokia Asha 203. Insert Sim card problem can occur in these phones in case of damaged Sim connector.
So first of all you should check if the Sim Connector in Nokia Asha 202 and Asha 203 is busted and replace it. If that is not the case then you have to replace the Sim IC placed near the Sim Jacket. I have marked the the Sim IC in the following diagram.
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Here are Nokia Asha 202 Insert Sim Problem Solutions. Please observe carefully.
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