See also:

Temperature
High temperatures accelerate the rate of corrosion to those parts which are not well ventilated. ...

Clearing the programmed information
Individual buttons cannot be cleared, however to clear all programming, push and hold the two outside buttons and release when the indicator light begins to flash (in approximately 20 seconds) ...

Training phrases
During the SA mode, the system instructs you to say the following phrases. (The system will prompt you for each phrase.) - phonebook transfer entry - dial 3 0 4 2 9 - delete call back number ...