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Appendix
Resetting the device
If the methods above do not solve your problem, perform a factory data reset.
Launch the Settings app and tap General management → Reset → Factory data reset →
Reset → Delete all. Before performing the factory data reset, remember to make backup
copies of all important data stored in the device.
Calls are not connected
• E nsure that you have accessed the right cellular network.
• E nsure that you have not set call barring for the phone number you are dialling.
• E nsure that you have not set call barring for the incoming phone number.
Others cannot hear you speaking on a call
• E nsure that you are not covering the built-in microphone.
• E nsure that the microphone is close to your mouth.
• I f using an earphone, ensure that it is properly connected.
Sound echoes during a call
Adjust the volume by pressing the Volume key or move to another area.
A cellular network or the Internet is often disconnected or audio
quality is poor
• E nsure that you are not blocking the device's internal antenna.
• W hen you are in areas with weak signals or poor reception, you may lose reception. You
may have connectivity problems due to issues with the service provider's base station.
Move to another area and try again.
• W hen using the device while moving, wireless network services may be disabled due to
issues with the service provider's network.
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