The Apple has released iPhone 4S with iOS 5.1.1. At that time, that was the most advance iPhone model and operating System combination ever. It means, before released the iPhone 5 and iOS 6 versions, it was the best combination. Any how, you can available many functions just like Siri from iPhone 4S with iOS 5.1.1. However, Apple doesn’t provide all most-wanted applications and functions with iPhone 4S iOS 5.1.1 yet. That’s why you must want to install Cydia on your iphone 4s. You can use Cydia to install any kind of application as your wish.
There is no way to download and install Cydia directly to iPhone 4S iOS 5.1.1. But Downloading and installing Cydia to iPhone 4S iOS 5.1.1 is not harder than previous versions of iOS and iPhone models.
There are Two free methods to download and install Cydia to iPhone 4S iOS 5.1.1. But we recommend to use first one. It is very easier than 2nd one.
1) Jailbreak iPhone 4S with redsn0w
If you want to download and install Cydia to your iPhone 4S iOS 5.1.1 Redsn0w jailbreaking is the easiest way. It is very simple process, and it only takes about 1o minutes to complete. Afetr Redn0w jailbreak Cydia will be available on your device springboard.Redsn0w is completely free tool by iPhone dev team. Currently redsn0w 0.9.14b2 is the latest redsn0w version. We recommend to use it for jailbreak your iPhone 4S with iOS 5.1.1
2) Jailbreak IPhone 4S with Absinthe
You can use Absinthe jailbreaking tool to download cydia to your device. When you jailbreak your iPhone 4S iOS 5.1.1 with Absinthe icon available on your Springboard. You can check Absinthe/Greenpoison website using this icon.
Then your device will automatically reboot and Cydia is available on your springboard
Please refer following step by step guides to jailbreak your iPhone 4S iOS 5.1.1 using Absinthe. This guide is not only for iPhone 4S. You can jailbreak iPhone 4 with iOS 5.1.1 using this guide