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SIM card error
SIM card damaged
Check the condition of the SIM card.
If it is damaged, contact the network
operator.
SIM card incorrectly installed
Check the installation of the SIM
card. Remove the card and reinstall it.
SIM card dirty or damp
Wipe the contact surfaces of the SIM
card with a clean cloth.
Failure to connect to network
SIM card invalid
Contact the network operator.
No coverage of GSM service
Contact the network operator.
Signal too weak
See Weak signal below.
Weak signal
Too far from base station
Try again from another location.
Network congestion
Try calling at a later time.
Echo or noise
Regional problem from bad network
relay
Hang up and redial. This may
switch to another network relay.
Failure to add a contact
Phonebook memory full
Delete contacts to free up memory.
Failure to set a function
Function not supported or
subscribed from network
Contact the network operator.