Or you can follow both of us on Twitter as well at www.twitter.com/148apps and www.twitter.com/gameloft. Then, write the following public tweet: "Upgrade to a 4S yet? Follow @Gameloft & @148Apps & RT for a chance to win an iPhone 4S! Gameloft gaming on the 4S: http://glft.co/uIR3Y1"
Once you've done either the Facebook or the Twitter route, head to the Contest Facebook Page and fill out the form to be entered.
It's as simple as that! Even better, there are more ways to increase your chances to win, so read the full rules and requirements here to learn how.
So what are you waiting for? An iPhone 4S hangs in the balance.