Trevi SICURO 10 Guide De L'utilisateur page 42

FAQs
Poor reception
Echoes or noises
Shorter standby time
Failed to turn on your phone
SIM card error
Failed to connect to the network
Failed to make a call
Causes
When you use your phone at poor
reception areas, for example,
near high rise buildings or base
rooms, the radio wave cannot be
transmitted effectively.
When you use your phone at
network traffic congestion, such
as working time and off-duty time,
the congestion can result in poor
reception.
This is related to the distance to
base station in question.
The trunk line of network is in bad
condition. It is a regional problem.
In some areas, the call lines are in
bad condition.
The standby time is relevant to
network settings.
Replace the batteries
When no signals are received,
your phone will continue searching
for base stations, thus consuming
a large amount of battery power
and reducing standby time.
The battery power is used up.
The SIM card is damaged.
The SIM card is not properly
installed.
The SIM card is invalid.
Beyond the GSM coverage.
The signal is feeble.
The call barring feature is used.
The fixed dialing number feature
is used.
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Solutions
Avoid this as far as you can.
Avoid this as far as you can.
You may ask the network service
provider to provide service
coverage map.
Hang off the call and dial again.
Choose another better line.
In poor reception areas, turn off
your phone temporarily.
Change with a new battery.
Use your phone at strong signal
areas or Turn off the phone
temporarily.
Check the battery power level or
charge the battery.
Contact your network service
provider.
Ensure the SIM card is properly
installed.
Contact your network service
provider.
Consult the network service
provider for service areas.
Retry at a stronger signal area.
Cancel the call barring settings.
Cancel the fixed dialing number
settings.