Sony Ericsson K550im Owner's Manual page 79

Solution: Remove the SIM card and
clean it. Also check that the card is not
damaged so that you cannot connect
it to the phone connectors. If it is
damaged, contact your network
operator to ask for a new SIM card.
Insert correct SIM card
Possible cause: The phone is set to
only work with certain SIM cards.
Solution: Check if you are using the
correct operator SIM card for your
phone.
Wrong PIN/Wrong PIN2
Possible cause: You have entered
your PIN or PIN2 incorrectly.
Solution: Enter the correct PIN or PIN2
} Yes % 73 SIM card lock.
PIN blocked/PIN2 blocked
Possible cause: You have entered
your PIN or PIN2 code incorrectly
three times in a row.
Solution: To unblock
% 73 SIM card lock.
Codes do not match
Possible cause: The two codes that
you have entered do not match.
This is the Internet version of the user's guide. © Print only for private use.
Solution: When you want to change
a security code (for example your PIN)
you have to confirm the new code by
entering exactly the same code again.
% 73 SIM card lock.
No netw. coverage
Possible cause: Your phone is in flight
mode.
Solution: Restart the phone in normal
mode % 7 Flight mode menu.
Possible cause: Your phone is not
receiving any radio signal, or the
received signal is too weak.
Solution: Contact your network
operator and make sure that the
network has coverage where you are.
If so, search for a network.
Possible cause: The SIM card is not
working properly.
Solution: Insert your SIM card in
another phone. If you still get the same
or a similar message, please contact
your network operator.
Possible cause: The phone is not
working properly.
Troubleshooting 79