6
Cold Boot & Emergency Erase
Initiating a Cold Boot is recommended in emergency situations, to erase
data stored in volatile memory that might compromise your security
(like SMS, call history, notes, appointments etc.). Please note that this
is not a very secure erasure procedure. Traces of your data might be
reconstructed in memory by a skilled adversary by means of advanced
computer forensics. Cold Boot will not erase the contacts and SMS mes-
sages stored on your SIM card. Also, a Cold Boot does not erase any in-
formation that you may have stored on SD memory cards. To initiate a
Cold Boot follow the following procedure:
Remove the battery, re-insert the battery, place the phone on a flat
surface, hold the softkeys (1) and () while pressing briefly the power/
hangup button (1 sec), wait till the screen becomes dark, then release
the softkeys simultaneously, press 0. Now the re-initialization process
takes place and the phone will boot up again after a while.
Note: No key material that might compromise the security of
your past calls is stored anywhere on your device. Upon com-
pletion of a secure call, all key material for the call is destroyed
and permanently erased. The recommendation for a Cold Boot
in emergency situations only relates to other data stored on the
device like notes, contacts, SMS, call history etc.
