How do I protect my phone from unauthorized use?
Your phone does not support password policy enforcement (Enterprise Security) at launch or gesture at launch. However, users that are security conscience can set a "Gesture" lock.There are also a number of applications available on marketplace that can add additional security measures.
You should use the screen lock to protect your phone from unauthorized use.
Press the Menu key from the Home Screen
Touch Settings Touch Location & Security Touch Set unlock pattern
Follow the on-screen instructions and draw your lock pattern. When prompted draw pattern to unlock phone.
If you fail to draw the correct unlock pattern on the screen after five attempts, the phone will prompt you to wait for 30 seconds before you can try again. If you forgot your screen unlock pattern, tap Forgot pattern. You will be prompted to sign in using your Google account and create a new screen unlock.
Your phone can still be powered off when locked.