Nokia 9210 User Manual page 243

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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.
Fax diverts and barrings are defined in Tools > Account settings... > ECM in
Messaging. Data barring is set in the Internet settings. Data calls cannot be
diverted.
8. Cannot select a contact
If you cannot select a contact in the Telephone, Fax, SMS or Mail directory, the
contact card does not have a telephone number, fax number, wireless phone
number or an e-mail address. Add the missing information to the contact card in
the Contacts application.
9. Cannot send or receive faxes, short messages or mail
Make sure that you have subscribed to these network services.
The phone may be off, or the communicator is low on memory.
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