This
solution applies to Samsung B7722i Insert 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 Samsung B7722i
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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members of our team. Still Use them at Your Own Risk we are not
responsible if these solutions may cause any harm to your phone.