HTC tattoo Mode D'Emploi

190  Managing Your Phone

You can protect your SIM card from unauthorized use by assigning a PIN (personal 

identification number).

Press HOME > MENU, and then tap Settings.

Tap Security > Set up SIM card lock, and then select the Lock SIM card 

check box.

Enter the default SIM card PIN, and then tap OK. To change the SIM card PIN, 

tap Change SIM PIN.

Tip 

Emergency calls can be placed at any time, without requiring a PIN.

If you enter the wrong PIN more times than the maximum number of attempts 

allowed, your SIM card will become “PUK-locked.” You need a new PUK code to 

restore access to the device. This code may have been provided by your operator 

when you received your SIM card.
Tap Emergency Dial and enter the following sequence on the keypad:
**05*[PUK code]*[new PIN]*[new PIN]#
For example, if your PUK code is 888888 and you would like to reset the PIN on your 

SIM card to 7777, enter the following into Emergency Dial:
**05*[888888]*[7777]*[7777]#

You can further secure your data by locking the screen and/or requiring a screen 

unlock pattern every time your phone is turned on or every time it wakes up from 

sleep mode (screen is off).