An iPhone 4S jailbreak is on the way, but jailbreaking is not for everyone. The biggest issue is that users will be voiding their warranty. There are usually no more is fast upgrades to new releases of iOS. If you are waiting for the jailbreak, you should also avoid installing iOS 5.0.1 to your 4S. The threat of malware has caused concern for Android users, and so far we havent seen a large number of malware infested jailbreak apps.”]
Source: http://www.shoaibyousuf.com/2011/12/five-reasons-not-to-jailbreak-your.html