The newer versions of iOS operating system launched by Apple always come with a bag of surprises and it is no wonder that people want to know about how to jailbreak iPhone 4s 5.1, now that the iOS 5.1 version is released. If you own a jailbroken or unlocked iPhone, experts will suggest you to stay away from any latest iOS version mainly because free jailbreak iPhone 4S and unlock tools are not made available easily. You will lose your jailbreak and unlock if you immediately upgrade to latest version of iOS operating system because Apple always makes it a point to patch security exploits in subsequent iOS releases. If you are longing to get your hands on iOS 5.1, then we have good news as jailbreak and unlock for iPhone 4 on 5.1 are available now.
Why jailbreaking an iPhone 4S 5.1 is necessary?
The idea of free jailbreak tools is to provide jailbreaking and unlocking available for everyone. Hackers took interest in hacking the proprietary iOS operating system and when they succeeded, they were able to install third party apps and tools that were not allowed by Apple. This demand for third party tools created a large market and jailbreak App store Cydia was formed later. More and more users found jailbreaking iPhone 4 to be highly beneficial as they were able to download numerous apps and tweaks that were otherwise unavailable.
The launch of iOS 5 stirred the jailbreaking scene because hackers admitted that untethered jailbreaking proved to be very difficult. As a result, only tethered jailbreak was made available for iOS 5 and other versions. Everyone was advised to stay away from future iOS 5.x upgrades because untethered jailbreak was not easy to come. However, many people impatiently upgraded their iOS operating system with a keen interest to try out the new things that iOS 5.1 has to offer. If you have upgraded your iOS firmware already or looking for some free jailbreak solution for iOS 5.1 installed already, you don’t have to worry as the hackers team has launched jailbreak.
How To Jailbreak the iPhone 4S using Redsn0w tethered jailbreak
Currently for iPhone 4 devices, jailbreaking an iPhone 4S on 5.1 is available, but it is only a tethered jailbreak. This means that you have to reboot your iPhone by connecting to a tethered boot utility every time. If you fail to do so, then you will end up losing your jailbreak. Redsn0w 0.9.9b8 provides the much awaited tethered jailbreak on 5.1 for iPhone 4. Before using Redsn0w, upgrade your iPhone iOS firmware to iOS 5.1 using iTunes. You should note here that this will upgrade your baseband and if you are an unlocker, you won’t be able to unlock your device any more with free jailbreak iPhone 4S.
- Step 1: Download Redsn0w 0.9.9b8. Different versions are available for different operating systems and so, make your choice accordingly. Download iOS 5.0 stock firmware.
- Step 2: Launch Redsn0w by clicking on the executable file.
- Step 3: Click on Extras and choose Select ipsw button. Now, choose the iOS 5.0 firmware. You should note here that it will not work with 5.1 firmware directly.
- Step 4: Now, go back and click on Jailbreak button.
- Step 5: Ensure that you select Install cydia option and then put your iPhone in DFU mode. The instructions can be obtained from Redsn0w itself.
- Step 6: Redsn0w will continue to jailbreak your device and you should not interrupt the process in the middle.
- Step 7: After Redsn0w completes, you have to reboot iPhone using Redsn0w by clicking on Extras -> Just boot. This step must be followed for every reboot to retain jailbreak.
- Step 8: Add the cydia source thebigboss.org/semitether and install the package to get semi tethered on iPhone 4. This will allow you to retain jailbreak while rebooting without jailbreak utility, but you still have to reboot properly for all the features to work.
Automatic jailbreak iPhone 4S provides untethered jailbreak
Tethered jailbreak is an annoyance because you can’t always ensure that you will have a computer with Redsn0w on standby for every iPhone reboot. That is why you should only use untethered jailbreak. Free solution for jailbreak iPhone 4S in untethered mode for 5.1 is not available, but you can use commercial jailbreak solutions.
The computer based software we suggest to jailbreak iPhone 4S on 5.1 in untethered mode is cost effective and automatic. This means that you don’t have to worry about choosing the iOS firmware version or staying with the computer software until jailbreak completes. With the push of a button, you can jailbreak and unlock your device even though you have unsupported baseband. The jailbreak and unlock will complete within a few minutes and software upgrade will be available for future firmware upgrades. Experts too recommend automatic iPhone 4S jailbreak computer based software for quick and hassle free jailbreak and unlock.

Even though you are most likely aware of the features that a jailbroken iphone 4 4.3 has to offer, we will give the top 3 reasons why iphone users choose to jailbreak iphones. Obviously, every iphone user has their own personal reasons of jailbreaking iphone 4 but these top 3 are still very popular among users looking to hack their iphone.
Aside from wondering what is jailbreak iphone 4, the most confusing aspect of it is the difference between using jailbreak software and iphone unlock software. Once you actually understand what they are, the differences are really black and white. When performing a jailbreak for iPhone 4, you are essentially hacking the iphone 4 firmware file that is loaded by the phone from the boot up process. By hacking this ipsw file, you are able to have access to processes of the iphone 4 system and you can do all sorts of modifications to the stock iphone software. Also, jailbreak iphone 4 is what opens the door to unlocking iphone 4. So when you are wondering what is jailbreak iphone 4, then it really helps to know how to jailbreak iphone 4 and what it entails exactly. On the contrary, unlocking an iphone 4 is changing the sim card settings to connect to a cellular network OTHER than what the sim card was programmed to connect to. That is what is most appealing when you jailbreak your iphone 4, is that you are able to then unlock it for another cellphone network service.