59TroubleshootingTroubleshootingThis section lists frequently asked questions that may arise during the use ofyour tablet, and gives easy answers and solutions to these questions.Aspect Question AnswerSIM card lock Whay can’t I use adifferent SIM card?Your tablet may come with a SIM cardlock, i.e., you will only be able to usethe SIM card provided by your networkoperator.To cancel the SIM lock, contact yournetwork provider.Audio Why is there nosound coming fromthe device?If the headset is plugged into thedevice, the speaker is automaticallyshut off. Disconnect the headset.Check that the device volume setting isnot muted.Check that the volume control is not atits lowest setting.Multimedia files Why can’t I view mypicture files?You may be trying to view an imagethat is not supported. Refer to“Multimedia” on page 62 for moreinformation.Why can’t I view myvideo files?You may be trying to view a video thatis not supported. Refer to“Multimedia” on page 62 for moreinformation.Why can’t I play mymusic files?You may be trying to play a file that isnot supported. Refer to “Multimedia”on page 62 for more information.Systeminformation andperformanceHow do I check theOS version of mydevice?Tap Apps > Settings > About tablet tocheck the OS version (Kernel/buildnumber) and other hardware andsoftware information.Power I couldn’t turn onthe device.The battery power may be depleted.Recharge the device. Refer to“Charging your tablet“ on page 9 formore information.Storage How do I checkmemory status?To check storage status, go to Settings> Storage.