By | December 13 2011 7:10 PM

Google's new Ice Cream Sandwich update for the Android mobile operating system has dozens and dozens of new features, so it's less of an update than an entire renovation. Some of the main selling points have been features like the Face Unlock facial recognition security feature and the (now cancelled by Verizon) option to use Google Wallet to turn your device into a debit card. But there are many more that you should be aware of if you plan on getting the Galaxy Nexus smartphone or if you have a mobile device that will get the update early in 2012. Here's quick rundown of some new features, and then there are some hidden tricks and tips we'll show you. In Ice Cream Sandwich, there are no more physical buttons for home, back, menu and search. Instead, they are capacitive buttons that live at the bottom of the screen. However, you can switch it up so that the screen spans the entire device. Google has added features like a zoomable calendar and the ability to take screenshots by holding down the power and volume buttons at the same time.