143When audio quality is poor:End a call and try again.When the other party cannot hear youspeaking:Your handset may be set to MUTE. Disable the MUTEfunction.When battery lifetime is shorter than usual:This may happen when you are in an area with low signalstrength. Turn off your handset when it is not in use. Changethe battery when battery energy is exhausted.When your cell phone does not turn on:Make sure your battery is charged. Check to see if yourphone works while recharging the battery.When you are unable to send a message:Either you are not registered to receive SMS service, or youmay be in an area where your network service providercannot provide such service.When you are unable to make a call:Your phone may be set to “fixed dial.” Cancel the “fixed dial”function.142C heck ListIf you experience any problem while using your cell phone,please refer to the following checklist. If the problem stillpersists, contact your dealer or nearest service centre.When the “Insert SIM Card” message appears:Make sure the SIM card is correctly installed. Check to see ifthe SIM card is working properly. If it does not work, try toclean the contact points of the card. If it is out of order, takeit to the nearest service centre.When the “Handset locked enter password”message appears:Enter the handset password. If you cannot remember thepassword, contact the nearest service centre.When the “Enter PIN1” message appears:InputPIN1. If you cannot remember it, contact the nearestservice centre. You can still receive calls even if your cellphone becomes locked after entering the incorrect PIN1 onthree consecutive attempts.When the “No service” or “Network failure”message appears:Check the SSI (Signal Strength Indicator) state. If you cannotmake a connection in underground areas or in buildingswhere signal strength may be low, try moving to anotherplace. If you still cannot make a connection, contact thenearest service centre.