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75
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Appendix
Appendix
Troubleshooting
Problem Possible Causes Possible Remedies
Unable to
switch on
The icon
appears
Calls not possible
Difficult to hear
the other party
Phone loses
network
SIM error
SIM card not
registered
Not able to
receive calls
Security code is
unknown
Empty battery
Defective battery
Weak signal
Outside GSM
coverage area
SIM not valid
Network access not
allowed
Dialling error
All calls barred
Another SIM inserted
Call barring set
____
Weak signal
Damaged SIM card
Network does not
recognise the SIM card
Call barring set
Divert set
“Entry security code”
is displayed
Charge the battery.
Replace the battery. Note that after
several years, gradual decline is
normal.
Move to an open space or nearer to a
window.
Check operator coverage map.
Call your service provider.
Try manual network search.
Use full national area code. When
abroad, use also international access
code to reach home country.
Check (Password is needed to clear).
Check for new restrictions.
Check outgoing call barring settings.
Adjust earpiece volume, and reduce
noise around you.
Reconnection, or connection to
another operator is automatic.
Switching phone off and on may
accelerate this.
Please contact your service provider.
Please contact your service provider.
Check incoming call barring settings.
Check call divert settings.
See “Personal lock” page 65.