Samsung Nexus S users were not facilitated with the face unlock feature in the official AOSP builds that was released in 2011. But this New Year we are here with the updation procedure for Galaxy Nexus after which you can enjoy the benefits of the most exciting feature of ICS that is the Face Unlock Feature. This face unlock feature is only for Galaxy Nexus GSM users and will operate on those Nexus GSM devices that are on rooted ICS firmware builds. Before proceeding into the updation procedure you must confirm that you are running on rooted ICS Android 4.0 firmware. Navigate to the path “Settings > About Phone > Firmware Version” to find out the exact version of Android OS. We wont be responsible for any harm caused to your device during the set up procedure that is unlikely to happen if you follow the instructions carefully. The set up procedure is only applicable to Samsung Galaxy Nexus S smartphones that are network unlocked so do not try it in any other devices as it might not be reversible and will harm the device by blocking it. In case you are not sure about the model number of your phone, you can find it by dialing “*#1234#” in your phone. Pre-Requisites: You ought to backup all the user data present in your phone since chances of data loss or corruption are there. Having a backup will help you replace the lost data if any damage occurs. Follow the link posted below to backup and restore all your data easily. Pre Upgrade Instructions for Rooting and Firmware Update Must Have:
Steps to Install Face Unlock Feature in Samsung Galaxy Nexus: Step-1: Root your Galaxy Nexus S first then download Face Unlock Package from the Must Have section to your computer. Connect the smartphone via original USB Cable obtained at purchase time and copy the downloaded zip file to your phone’s SD Card. Do not place the downloaded zip file deep into any sub-folders else it wont get detected. Step-2: After copying is over, remove the connected USB Cable and power off your phone to enter into Recovery mode. The Recovery mode can be entered by pressing Volume up key + OK button and holding both press Power button simultaneously. Step-3: In Recovery mode choose “Install zip from SD Card” and a list of files will be displayed in your phone. Select the Face Unlock Zip file placed in your phone after which you will again land up in Recovery mode. In Recovery mode choose “++++Go Back++++” then “Reboot system now” option to reboot the phone. Next choose “Wipe data/Factory reset” then “Wipe Cache partition” to clear all cache data present in phone. Thus by following the above steps carefully you can easily update the Face Unlock Feature on Samsung Galaxy Nexus S.