Zte T230 User Manual page 71

ERROR MESSAGES
Message
No SIM Card
Enter PIN code
Enter PUK code
Enter Unlock Code
Solution
Check a valid SIM card is inserted.
See the Getting Started section
You have set a SIM PIN. Please enter your SIM
PIN code.
Contact your Service Provider to get the PUK
code
Contact your Service Provider to obtain the
network unlocking code.