Only one chance to enter PIN?

[Mikhail Umorin]

Hello --

I have enabled PIN for my SIM (rhymes, ah?). As I turn FR on it asks me to 
enter it. However, it takes awhile and I usually forget to wait for the PIN 
dialogue to come up. After a while, either due to suspend, or due to 
accidentally pressed buttons, the PIN entry dialogue vanishes and I am left 
with "No service". 

Is there a way to enter the PIN at this time? What is the original GUI app 
that asks for the PIN in the first place?

Mikhail.