[FruitBerries]

Hi,
It is not a network coverage issue. It is not working in areas where it use to work and I tried from different locations. And that problem is running for quiet some time now. I called my carrier; the tech guy locked/unlocked my SIM and ask me to restart my device. Perhaps He hasn't thought through, perhaps the problem is from the SIM itself. I will test it with an other device or ask for a new card.
But what if the problem doesn't come from there? Should I try to reinstall the OS?