SIM NOT WORKING!
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Power off your phone, & remove the SIM card.
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Clean the gold plated area of your SIM card using a neat cloth
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Insert the SIM card properly in slot 1
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Switch on your device, by pressing the power button.
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Go to the phone settings,
and toggle the airplane mode
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Change the device network selection to Automatic mode.
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Change the network mode to 4G/3G Recommended
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