Changing emergency disarm code The current emergency disarm code must be known to change the code Find the factory issued emergency disarm code on the sticked inside printed manual.  The emergency disarm code can use any digits except zero Changing the emergency disarm code by SMS text command To change emergency disarm code, send SMS text command 0050XXXXYYYY, where XXXX - 4 digits of an old code YYYY - 4 digits of a new code.