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Copyright © 2005 Nokia. All rights reserved.
recommended that you move the device to a location
where the strongest possible wireless signal can be
obtained. When the signal is strong, data transmission is
efficient. In general, you should not expect the same
performance from wireless data communications as from
landline communications, due to the inherent
characteristics of the wireless environment.
The following factors may impair wireless connections in
the form of noise, low or lost signal, erroneous function of
the device, or distorted display:
Noise – Radio interference from electronic appliances and
equipment, as well as from other phones will affect the
quality of wireless data transmission.
Roaming – As the smartphone user moves from one
network cell to another, the signal strength of the channel
drops and the wireless telephone exchange may hand the
user over to a different cell and frequency, where the
signal is stronger. A cell handover may also occur when
the user is stationary, due to varying network traffic loads.
Such handovers may cause slight delays in transmission.
Electrostatic discharge – A discharge of static electricity
from a finger or a conductor may cause erroneous
functions in electrical devices. The discharge may result in
distorted display and unstable software operation.
Wireless connections may become unreliable, data may
become corrupted, and transmission halted. In this case
you need to end the existing call (if any), switch off the
device (if on) and remove the battery. Then replace the
battery and establish a new wireless connection.
Dead spots and dropouts – Dead spots are areas where
radio signals cannot be received. Dropouts occur when the
smartphone user passes through an area where the radio
signal is blocked or reduced by geographical features or
large structures.
Signal impairment – Distance and obstacles can cause
signals to become out-of-phase. They can also cause
reflected signals. Both situations 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
enough or stable enough to provide a reliable data
connection for communication. Therefore, to ensure the
best possible communication, remember the following
points:
• The data connection works best when the device is in
a stationary position. Attempting wireless data
communication while in a moving vehicle is not
recommended.
• Do not place the device on a metal surface.
• Check that the signal strength on the smartphone
display is sufficient. Moving the smartphone within a
room, especially towards a window, may result in a
stronger signal. If a signal is not strong enough to
support a voice call, data connection should not be
attempted until you can find a location with better
signal reception.