Samsung SM-G130BU User Manual

troubleshootingIf you are having trouble with your mobile phone, try these troubleshootingprocedures before contacting a service professional.While using your phone, the following messages may appear:Message Try this to solve the problem:Please insert SIM card Ensure that the SIM card is installedcorrectly.Phone lock When the phone lock feature is enabled,you must enter the password you set forthe phone.Enter PIN When using the phone for the first timeor when the PIN requirement is enabled,you must enter the PIN supplied with theSIM card. You can disable this featureby using the PIN lock menu.Enter PUK Your SIM card is blocked, usually as aresult of entering your PIN incorrectlyseveral times. You must enter the PUKsupplied by your service provider.Your phone displays “Network unavailable” or “Network error.” When you are in areas with weak signals or poor reception, you may losereception. Move to another area and try again. You cannot access some options without a subscription. Contact your serviceprovider for more details.You enter a number, but the call is not dialled. Ensure that you have pressed the Dial key: [ ]. Ensure that you have accessed the right cellular network. Ensure that you have not set call barring for the phone number.Another caller cannot reach you. Ensure that your phone is turned on. Ensure that you have accessed the right cellular network. Ensure that you have not set call barring for the phone number.Another caller cannot hear you speaking. Ensure that you are not covering the built-in microphone. Ensure that the microphone is close to your mouth. If using a headset, ensure that it is properly connected.

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