135134Solving ProblemsThe phone starts beeping and “**Warning**Battery Low” flashes in the display• The battery is insufficiently charged. Replace thebattery and recharge it.The audio quality of the call is poor• Check the signal strength indicator in the display( ); the number of bars after it indicates thesignal strength from strong ( ) to weak ( ).• Try moving the phone slightly or closer to awindow if you are in a building.No number is dialled when you recall aphonebook entry• Check that the numbers have been storedcorrectly, by using the Phonebook Search feature.• Re-store them, if necessary.If the above guidelines do not enable you to solvethe problem, take a note of:• The model and serial numbers of your phone• Your warranty details• A clear description of the problemThen contact your local dealer or SAMSUNGafter-sales service.Reference InformationAccess CodesThere are several access codes that are used by yourphone and its SIM card. These codes help you protectthe phone against unauthorised use.The access codes (except for the PUK and PUK2 codes)can be changed using the Security Settings (5-3) menuoptions. See page 110 for further details.Phone PasswordThis security code can be used to avoid unauthoriseduse of the phone. The security code 0000 is the factorydefault setting but you are advised to change thesecurity code before you start using your phone. Keepthe new code secret and in a safe place, which isseparate from the phone.If you key in an incorrect security code five times insuccession, the phone will not accept the correct codefor the next five minutes.