User guide
YOUR PERSONAL SETTINGS
LOCKING YOUR TREO 750 AND INFO
219
12
CHAPTER
NOTE You need your PIN number to edit 
your PIN number or remove the locking 
feature. If you enter an incorrect PIN more 
times than allowed by AT&T, the SIM card 
locks. Once the SIM card locks, you need 
the PUK (PIN Unlock Key) to unlock the 
SIM card. Contact AT&T for more 
information and the PUK.
Locking your Treo 750
To protect your personal information, you 
can lock the system so that you need to 
enter your password to access any of your 
information or use other features of 
your Treo 750.
IMPORTANT If you lock your system, you 
must enter the exact password to unlock it. 
If you enter an incorrect password, you are 
given another chance. Each time an 
incorrect password is entered, you are 
given progressively longer time periods 
between your chances to enter the 
password. If you forget the password, you 
need to perform a hard reset to resume 
using your Treo 750. Performing a hard 
reset deletes all the entries in your Treo 
750. However, you can restore all 
previously synchronized info the next time 
you sync (see Defining speed-dial buttons
.
1 Press Start   and select Settings.
2 On the Personal tab, select Lock .
3 On the Password tab, check the 
Prompt if device unused for box to 
turn on the password feature.
4 Select the first list, and then select how 
long a period of inactivity must pass 
before you are prompted to enter a 
password to unlock the system.
5 Select the Password type list, and then 
select a format for your password.
6 Select Password, tap the onscreen 
keyboard icon, and enter your 
password. Then tap the onscreen 
keyboard icon.
DID
YOU
KNOW
?
You can permanently unlock 
your SIM card. Select Menu, Preferences, 
and then Phone Settings. Select the 
Security tab and uncheck the Require PIN 
when phone is used box.










