Archived from groups: alt.cellular.nokia (More info?)
> Screen Reads Sims Blocked Enter Puk Code What Is This
You (or someone) has entered the SIM PIN 3 times incorrectly. You will
need to call your network operator or SP and ask for the PUK (personal
unblock key). They should then tell you how to enter the PUK.
If you didn't do this someone has been fiddling with your phone.