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248
Troubleshooting
5. Cannot make or receive calls
Check to see if you have ‘Flight’ profile turned on. When this profile is active you
cannot make or receive calls.
Make sure that the phone is not off. Close the cover and switch on the phone.
If you get the message INVALID SIM CARD, your SIM card cannot be used in the
communicator. Contact you dealer or network service provider.
Check the status of your call barrings and diverts, see ‘Network services settings’
on page 82.
The phone may be busy: data or fax is being sent or received, or the communicator
is being used as a fax modem. Wait for the data/fax transmission to end, or drop
the call by pressing the key on the phone keypad.
6. Call quality is poor
Your location may not allow better call quality. This problem may occur especially
in a moving car or train. Move to a location where the radio signal reception is
better. See ‘GSM data transmission’ on page 8.
Reception is usually better above ground level, outdoors and while stationary.
Sometimes even moving the communicator slightly will improve reception. You
can also try using the communicator in the handsfree mode, see page 70.
Remember to turn the antenna to an upright position.
7. Cannot divert or bar voice, fax or data calls
You may have not subscribed to the service in question, or it is not supported by
the network, or the message centre number and the number to which you want to
divert your calls may be missing or incorrect.