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.
Possible cause: You have entered your PIN or PIN2 incorrectly.
Solution: Enter the correct PIN or PIN2
PIN Blocked/PIN2 Blocked. Possible cause: You have entered your PIN or PIN2 code incorrectly three times in a row.
Solution: To unblock % 81 SIM card lock.
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.
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.
Troubleshooting 87
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