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It is not possible to jailbreak an iPhone without using a computer. You need a PC or Mac to jailbreak your iPhone. Try to search for redsnow or other jailbreaking software for PC or Mac. Hope it helps.
CLICK HERE to download 4.3.1 IPSW files and other earlier versions. Select it from the dropdown menu.
You can also try locating it locally on your computer. For Mac, go to: Users>HOME FOLDER>Library>iTunes>iPhone Software Updates>
For Windows, go to: C>Documents and Settings>HOME FOLDER>Application Data>Apple Computer>iTunes>iPhone Software Updates>
NOTE (For PC users): Application Data is a hidden folder, make sure to set hidden files visible from Control Panel>Folder Options>View>
WARNING: The following basebands are still UNLOCKABLE. DO NOT UPDATE to iOS 4.3.1 (or higher) if you need the unlock:
05.14.02 - iPhone 3G & 3GS, iOS 4.1
05.15.04 - iPhone 3G & 3GS, iOS 4.2.1
05.16.00 - iPhone 3GS, iOS 4.3 and 4.3.1
05.16.02 - iPhone 3GS, iOS 4.3.2
03.10.01 - iPhone 4, iOS 4.2.1
04.10.01 - iPhone 4, iOS 4.3 and 4.3.1
Update iTunes to 10.2.1 for best results.
Plug your iDevice to your computer
Turn OFF your iDeviceTo turn OFF, press and hold the POWER button for about 3 to 5 seconds then slide the red bar on top of your iDevice's screen saying "slide to power off"
Open/Run redsn0w and click BrowseNOTE: The screenshots you'll see here are taken from a Mac and earlier version of redsn0w, however, the process is completely the same if you'll be working on a PC (Windows) or a newer version of redsn0w.
Locate the official IPSW.Use the following:4.3.2 IPSW if you have iOS 4.3.2 on your iDevice4.3.1 IPSW if you have iOS 4.3.1 on your iDevice4.2.1 IPSW if you have iOS 4.2.1 on your iDevice
redsn0w will process and identify the IPSW
Click Next and let redsn0w do what it have to do
Check on Install Cydia and click NextClick image for larger view.
Turn OFF your iDevice (just a reminder from step 2). Before you click Next, read steps 9 to 11 first in preparation for putting your iDevice to DFU mode
Press and hold the POWER button for three (3) seconds
Continue holding down the POWER button then press and hold the HOME button as well. Hold them both for another ten (10) seconds
Release the POWER button but keep holding the HOME button
You can release the HOME button once you see redsn0w in the process of jailbreaking your iDevice
Click Finish and you're done on the computer, and as it says, the rest takes place on your iDevice.
All you need to do now is wait and keep it plugged in your computer. DO NOT INTERRUPT!
Once complete, you will find Cydia on the 2nd page of your iDevice's homescreen and it should operate as usual.
If you have an iPhone and you're able to preserve your baseband, you can CLICK HERE to UNLOCK.
Apple fans have been waiting for a newJailbreak and a Carrier Unlock for the new iOS 4.2.1, and the iPhone Dev Teamhas released the goods. It may not be simple, but at least a solution isavailable. One of the most fortunate thing was that the newer upgradedid not update the baseband, and so the baseband remained at 05.13.04. So u<b><span>nlock and jailbreak foriPhone 4, 3G and 3Gs</b>becamemuch more easier, however the good thing is that iPhone 4,3G,3Gs can beunlocked and jailbroken on the iOS 4.0.2/4.1 or 3.1.3 at the moment, becausethe current jailbreaking & unlocking tools are compatible with iOS4.0.2/4.1 or 3.1.3. Unlocking Ltd. has introduced a fresh iPhone unlocksoftware that will allow users to explore their Apple iPhone's customizationand application capabilities. Specifically, it can "unlock and jailbreak iPhone4.2.1, 3G 3Gs and iPhone 4 4.2.1."</span>
The veryfirst unlocking software for iPhone was unlocked by iPhone Unlocking Ltd inJuly 2007. More than one million customers from more than 145 countries havedownloaded the software. Additional features are added to a mobile phone, thanksto jailbreaking and unlocking has become a trend among iPhone users. Users canalready explore the various functions of their iPhones once it has beenunlocked and jailbroken. If we are mac users, we can put dvd to iphone 4 by a<a href="http://www.dvdtoiphone4.com/mac-dvd-to-iphone-4.html"> dvd to iphone 4mac</a> converter after our jailbreaking, you will find it is so easy for us to<a href="http://www.dvdtoiphone4.com/guides/convert-dvd-to-iphone-4.html">convertdvd to iphone 4</a>.
Now we can jailbreak or unlock iPhone4/3Gs/3G with the latest tool that allows iOS jailbreak 4.2.1/4.1 and thatis compatible with Cydia and MobileSubstrate as easy as ABC. As you've said,this jailbreak is compatible with all models of iPhones but to differentdegrees. The new tool available at UnlockGuide website is very simple to useand guaranteed to jailbreak and unlock iphone4/3GS/3G running iOS 4.2.1 orolder versions.
Owners of the popular iPhones will now beable to unlock the very latest ios 4.2.1 for iPhone 3G and iPhone 4. The firstsolution to jailbreak was announced by iPhone Unlocking Ltd. Unlocking a mobilephone is not the same from jailbreaking even if both provide users additionalbenefits to an iPhone. When a buyer purchases an iPhone, it is fixed or lockedbased on what the manufacturer has provided in terms of its exclusivefunctionalities. What's more, any GSM card will be compatible with the softwarebeing offered by iPhone Unlocking Ltd., and the features are also compatiblewith the latest baseband worldwide. User will be able to use any networkprovider from anywhere in the world once they have unlocked their iPhones.
If you have a newer model (iPhone 3G andnew iPhone bootrom 4), your <a href="http://www.dvdtoiphone4.com/guides/jailbreak-iphone-4.html">jailbreak iphone4</a> will be tethered. Indeed, if you have not installed any applications thatinterfere with the functioning of the SpringBoard or CommCenter, your iPhonewill boot up correctly. However, if you have installed applications thatrequire MobileSubstrate (Infiniboard example) and that interfere with thenormal operation of SpringBoard, your iPhone will remain stuck on the Applelogo at startup. We also remind those wishing to conserve or unlock unlocktheir iPhone, it should not be used redsn0w and update your phone iOS 4.2.1. Makethe update via iTunes 4.2.1 iOS 10.1 (this is important) using the firmware youjust downloaded (Hold down the Shift key on Windows, then click Update andselect the file. ipsw you downloaded).<br /><br />
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If there is a jailbreak for the iPhone 5, which if not running a new ios there should be, just go on Google type in iPhone 5 which ever is you are running, jailbreak (I.e. iPhone 5 ios 8 jailbreak) that should give you a list of jailbreaks that should work on your phone. Just backup the phone before jailbreaking, just in case.
iPhone 5 is running the latest operating system iOS 6 which is yet to be jailbroken. There are vulnerabilities found on iOS 6 which may give a jailbreak in the future. iOS 6 jailbreak for iPhone 5 is not available yet. Best think do do is not update your iPhone from iOS 6