Unlock With Wi-Fi Available For Android Users
If youre an Android user, a forum member at XDA-Developers has designed an application named Unlock With Wi-Fi that allows you to set a password for your device, but auto disable the security when youre at home, work or wherever you connected specific set of Wi-Fi connections.
Upon arriving within Wi-Fi range of a predefined access point you will have to enter your unlock code once. After that your device will stay unlocked as long as you are connected to that Wi-Fi access point.
You can check out more about the app over at XDA via this link.