How to enable a password on Android devices
Setting up your device
Protecting your data and personal information on an Android 2.2 device is simple, but each Android device may operate a little different. Since Android is just the operating system, each manufacturer's device may have a different menu system for the settings. The images below are generic Android 2.2 menu and are not representational of a particular device.
Press the MENU button on the HOME SCREEN and then select SETTINGS on your device.
Scroll down to the LOCATION AND SECURITY option and press it.
Locate the SET UP SCREEN LOCK under SCREEN UNLOCK.
There are 3 options for locking your device for you to choice. Each will option will help protect your data and personal information in the event it's lost or stollen.
Locking Option: Pattern
Choosing the PATTERN options, allows you to create a unique pattern that you create to unlock your phone.
Locking Option: PIN
Choosing the PIN options, allows you to create a unique PERSONAL IDENTIFICATION NUMBER that you create to unlock your phone.
Locking Option: Password
Choosing the PASSWORD options, allows you to create a unique PASSWORD that you create to unlock your phone.