Nokia E71 User Manual page 28

Settings
please modify the password. Then you need to
enter the password if you want to activate,
deactivate, or modify the password to process
operation, and the password has 6 digits. To
activate it, you have to enter a preset mobile phone
number (The mobile phone number set to receive
the message if the phone is stolen) apart from the
password.
After activated, the phone stores the IMSI number
for original SIM card, which is sole and unique, if
you insert another SIM card, there will be a prompt,
asking you to input the guardlock password. If you
wrongly enter the password for three times in
succession, the phone will default it as illegal and
display a relevant prompt, then collect and send
information like CELLID, LAC, MCC, MNC, MCN to
preset mobile phone number. While receiving this
message, legal user can report it to the police, who
can inquire the illegal usage situation (Including the
used location, call history, etc) from network
operator via the piece of information.
The message will be kept senting to the preset
mobile phone till it is successfully received. If the
stolen phone is on over 24 hours or re-switch on,
the phone will resend a message to your preset
phone number. When the message has been
successfully sent up to 15 times, any illegally used
SIM card won't work in the stolen phone, which will
automatically switched off.
Caution:
Please report to the police timely if the phone is
stolen, but this doesn't mean that the lost
phone will be definitely traced back. Therefore,
please take care of your personal property.
If the phone defaults the SIM card inserted is illegal,
then guardlock function can not be activated, and
relevant setting can not work. If another SIM card is
inserted, enter correct password, message count
will be sent from zero, meanwhile, there will be a
prompt, asking you whether to bind this SIM card.
Select binding, then the phone will renew the IMSI
number and default the SIM card as the designated
one.

Activated: Before activating this function,
please set the password first, if password hasn't
been set, then
password] to finish the password setting and
back to activate this function. While activating it,
guardlock password and notified mobile phone
number (The number to receive the information
please enter [Change