HTC Dream User Manual - Page 198
Protecting Your Device, Protect your SIM card with a PIN, Protect your phone with a screen lock
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198 Managing Your Device 11.2 Protecting Your Device Protect your SIM card with a PIN You can protect your SIM card from unauthorized use by assigning a PIN (personal identification number). To enable the SIM card PIN 1. Press HOME > MENU, then touch Settings. 2. Touch Security & location, scroll down the screen, then touch Set up SIM card lock. 3. Select the Lock SIM card option. 4. Enter the default SIM card PIN using the keyboard, then touch OK. 5. To change the SIM card PIN at any time, touch Change PIN code. Tip Emergency calls can be placed at any time, without requiring a PIN. Protect your phone with a screen lock You can further secure your data by locking the screen and/or requiring a screen unlock pattern every time your device is turned on or every time it wakes up from screen off (sleep) mode. To lock the screen Press the END CALL/POWER button. Locking the screen prevents accidental screen touches when the device is in your bag, purse, or pocket. Note To unlock the screen, press MENU twice.