Nokia 9290 - Manual (Page 62)

44
Getting started
Cell handover
As the phone user moves from one network cell to another, the signal strength
of the channel drops and the wireless telephone exchange may handover the
user 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 wireless traffic loads.
Such handovers may cause slight delays in the transmission.
Electrostatic discharge
A discharge of static electricity from a finger or a conductor may cause erroneous
functions in electronic devices. The discharge may result in distorted display and
unstable software operation. Wireless connections may become unreliable, data may
become corrupted, and the transmission halted. In this case you need to end the
existing call (if any), close the cover and switch off the phone (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 phone 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.