Provider (SP) Lock
menu is used to lock the
cell phone to the
SP's SIM card. Once the
cell phone is locked to a specific operator, if one
inserts a SIM card from a
different operator the phone will refuse to
The cell phone will
however accept another SIM card from the
this lock one needs a special secret code that is
available to the end user.
(not even to you... or is it ? in case please
let me know!)
is how to activate the menu:
to Network? if pressing yes you have 5 attempts
to enter NCK.
Lock to Network subset? if pressing yes you have
5 attempts to enter NSCK.
Your phone can be locked
to a service provider FOREVER by
If an invalid code is
entered all five times, the menu will exit and
Any further attempt to
activate the NCK/NSCK lock Menu
will result in the response
However the NCK/NSCK lock can be recover
through a direct clearing
in the EEPROM.