Possible cause: The two codes that you have entered do not match.
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. %127 SIM card lock.
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, try to do a new search.
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.
Solution: Insert your SIM card in another phone. If this works, it is probably the phone that is causing the problem. Please contact the nearest Sony Ericsson service location.
Possible cause: You are within range of a network, but you are not allowed to use it. However, in an emergency, some network operators allow you to call the international emergency number 112.
Solution: You have to move to get a signal that is strong enough. Contact your network operator and make sure your subscription is ok. %26 Emergency calls.
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