Nexus S received the Android 4.0 update a few weeks back though not all the features of ICS were available in the Nexus S update and one of the feature was Face unlock and the the main reason behind that was the VGA front camera. Many of the Nexus S users were really upset about the decision taken by Google, but the developer community is always there to look out for all the consumers and now this time they have taken the official update and have embedded face unlock into it.
This ROM is available for both Nexus S and the exclusive to Sprint Nexus S 4G, so both the users must be really happy. The developers have said that face unlock is not that bad on the Nexus S, it works smoothly even with beard and glasses on but I think there will be some problem to open the device in some dark places, but again Google has themselves told openly that this is not a very serious security feature for the device. So if you have any of the Nexus download the link given below and flash these ROMs onto your Nexus S.
Download Links:
Source: AndroidCentral