So let’s say you have your precious modem with your sim card with pin code enabled. Let’s remove that bastard!
AT+CPIN?
+CPIN: SIM PINAT+CPIN=3714
OKAT+CLCK=”SC”,0,”3714″
OKAT+CPIN?
+CPIN: READYOK
Obviously, you should replace 3714 with your current pin code.