73FAQ, troubleshooting and error messagesAppendixFAQ, troubleshooting and errormessagesThis section lists frequently asked questions that may ariseduring the use of your smartphone, and gives easy answersand solutions to these questions.Aspect Question AnswerAudio Why is there nosound comingfrom the device?Disconnect the headset.Check that the device volume setting isnot muted. Tap thecommunicationicons at the top of the screen.Check that the volume control is not atits lowest setting.MultimediafilesWhy can’t I viewmy picture files?You may be trying to view an imagethat is not supported. Refer toMultimedia on page 75 for moreinformation.Why can’t I viewmy video files?You may be trying to view a video thatis not supported. Refer to Multimediaon page 75 for more information.Why can’t I playmy music files?You may be trying to play a file that isnot supported. Refer to Multimedia onpage 75 for more information.SysteminformationandperformanceHow do I checkthe OS version ofmy device?Tap > Settings > System > SystemInformation to check the OS version andother hardware and softwareinformation.Power I couldn’t turnon the device.The battery power may be depleted.Recharge the device. Refer to Chargingthe battery on page 16 for moreinformation.