Philips ISIS Cellular Telephone
(170-1220)                 Troubleshooting            Faxback Doc. # 47365

Problem                             Solution

Your phone is on, but the           The network connection is lost. Either
network registration symbol         you are in a radio shadow (in a tunnel
[Antenna symbol] is not             or between tall buildings) or outside
displayed.                          the network coverage area. Try placing
                                    your call from another location.

Your phone is on, but never         Check your ring volume (see Faxback
rings.                              Doc. # 47363). The silent ringer may
                                    be switched on.

The roaming symbol [Triangle]       Check the roaming option (see Faxback
is constantly flashing even         Doc. # 47363) You may have specified
though you are in your home         an inappropriate network type.
area.

The display does not respond        The display responds more slowly at
(or responds slowly) to             very low temperatures.  This is normal
keystrokes.                         and does not affect the phone
                                    operation.  Take the phone to a warmer
                                    location and try again.

Your phone does not go to           Either press and hold [<C].
Standby mode.
                                    Or switch off the phone, check that
                                    the battery is installed correctly
                                    and try again.

You cannot remember your            Ask your dealer to reprogram your
lock code.                          phone with a new code.

(BR/eb 4/29/98)