Nokia 9110 User Manual page 15

Dead spots and dropouts
Dead spots are areas where radio signals cannot be received. Dropouts occur
when the wireless phone user passes through an area where the radio signal is
blocked or reduced by geographic or structural obstructions.
Signal impairment
Distance and obstacles can cause out-of-phase reflected signals that result in
a loss of signal strength.
Low signal strength
Due to either distance or obstacles, the radio signal strength from a cell site
may not be strong or stable enough to provide a reliable cellular connection
for communication. Therefore, to ensure the best possible communication,
remember to consider the following points:
The data connection works best when the communicator is in a stationary
position. Attempting cellular communication while in a moving vehicle is not
recommended. Fax transmission is more easily impaired than data or short
message transmission.
Do not place the communicator on a metal surface.
Check that the cellular signal strength on the communicator displays is
sufficient. See "Communicator display" on page 20 and "To make a call" on
page 149. Moving the communicator within a room especially towards a
window, may result in a stronger signal. If the cellular signals are not strong
enough to support a voice call, data connection should not be attempted until
you can find a location with better signal reception.
Note: When the
antenna is up, the
signal is stronger.
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