Display message Cause/solutionInvalid R There is no handset registered to the base unitmatching the handset number you entered.R The handset is not registered to the base unit.Register the handset (page 53).Requiressubscriptionto Caller ID.R You must subscribe to a Caller ID service. Once youreceive caller information after subscribing to a CallerID service, this message will not be displayed.Userechargeablebattery.R A wrong type of battery such as alkaline ormanganese was inserted. Use only the rechargeableNi-MH batteries noted on page 5, 8.TroubleshootingIf you still have difficulties after following the instructions in this section, disconnect the base unit’sAC adaptor, then reconnect the base unit’s AC adaptor. Remove the batteries from the handset,and then insert them into the handset again.General useProblem Cause/solutionThe handset does not turn oneven after installing chargedbatteries.R Place the handset on the base unit or charger to turn onthe handset.The unit does not work. R Make sure the batteries are installed correctly (page 11).R Fully charge the batteries (page 12).R Check the connections (page 11).R Unplug the base unit’s AC adaptor to reset the unit.Reconnect the adaptor and try again.R The handset has not been registered to the base unit.Register the handset (page 53).I cannot pair a cellular phone tothe base unit.R Depending on the compatibility of the cellular phone, youmay not be able to pair it to the base unit. Confirm thatyour cellular phone supports the hands-free profile (HFP)specification.R Confirm that the Bluetooth feature of your cellular phoneis turned on. You may need to turn this feature ondepending on your cellular phone.R The Bluetooth technology on your cellular phone may notbe functioning normally. Turn off and on your cellularphone.R If your cellular phone is already connected to anotherBluetooth device such as a Bluetooth headset, turn it offor disconnect it from your cellular phone.R Some cellular phones may require you to enter theBluetooth PIN to pairing. Confirm that you entered thecorrect PIN.For assistance, please visit www.panasonic.com/support 73Useful InformationTGF37x(en)_1128_ver032.pdf 73 2014/11/28 16:08:43