Will Galaxy Nexus have the guts to take on Apple's iPhone 4S ?

As Apple’s iPhone 4S became a blockbuster with sales of 4 million in less than a week, Samsung and Google on Wednesday launched Galaxy Nexus smartphone to take Apple head on. Galaxy Nexus is the first mobile handset to use the latest version of Android operating system called Ice Cream Sandwich.

If Siri is one of iPhone 4S’s killer features, Galaxy Nexus boasts facial recognition as one of its fi rsts. Called Face Unlock, it’s a facial recognition technology to activate smartphones. The combined might of Google’s software and Samsung’s hardware is the most powerful competition to iPhone. Here are the key details of both iPhone 4S and the new Samsung Galaxy Nexus.