![Ios Ios](/uploads/1/2/5/5/125523631/216360551.png)
A firmware is an IPSW file that contains everything needed to run the core operating system, iOS. Beta firmwares have also been released, but require an Apple Developer account to acquire. To check for updates, iTunes contacts itunes.apple.com.
Update February 20th With iOS6.1.2 now available the window to upgrade jailbroken devices to iOS 6.1 is now closed, iOS 6.1.2 is currently not jailbreakable with redsn0w (but it is with!)- this post will be updated when the next version of redsn0w is released to jailbreak iOS 6.1.2 In the meantime this information below will only work if you have your SHSH blobs saved locally or on Cydia. The latest version of redsn0w allows iPhone 3GS and iPhone4 to be jailbroken to iOS6. The jailbreak is a mixture of boots at this stage:. iPhone 3GS Old Boot Rom – untethered. iPhone 3GS New Boot Rom – tethered. iPhone 4 – tethered. iPod Touch 4th Gen – tethered.
iPhone 4S. iPhone 5. iPod Touch 5th Gen.
iPad 2 & 3. iPad 1 – max iOS 5.1.1 If you don’t care about the baseband and are already working with an unlocked IMEI, follow this. If you are looking to downgrade to an earlier iOS version such as from iOS 6 to iOS 5.x or downgrade between iOS 5.1.1 or 5.1 or 5.0.1 and your SHSH blobs are on Cydia you can use the same restore procedure in the guide to restore to that iOS the only difference is that you need to specify the correct iOS IPSW that you want to downgrade to. And if you need that baseband preserved just remember to click on the preserve baseband when prompted. How to upgrade a previously jailbroken iPhone to iOS 6 and preserve the baseband.
The process of getting this job done requires a number of steps (but are easily done), which are downloading the official iOS 6 firmware from Apple, upgrading iTunes to the latest version, getting the latest redsn0w software from the dev team. If you are new to this it can well be intimidating with loads of jargon but take your time and go through the information below. This process has been tested and successfully installed/Jailbroken on a iPhone 3GS old boot rom device that has been previously jailbroken. Please note at this point ‘ ultrasn0w‘ is not ready for iOS6 eventhough Cydia is, so if you rely on your baseband being unlocked by ultrasnow you need to wait 2 days before it is released.
But if you still want your baseband preserved but don’t rely on ultrasn0w then you are good to go. You also can bypass ultrasn0w and just pay out the original carrier to unlock the phone by using an online service like Previously users had to create their own custom IPSW files, but the latest redsnow avoids this. This will not work on iPhone 4s and iPad2/iPad2 known as A5 devices. Note on Tethered Boot! If your iPhone requires a tethered boot this means that the device requires a software jumpstart (everytime it is booted) to operate after being jailbroken, there are a few apps that can do this but redsn0w also has the function built in.
So if you have successfully jailbroke but are stuck on iPhone Apple logo, spinning gear on iPhone boot up, connect the iPhone, launch redsn0w Extras. Then ‘just boot tethered right now’. This also applies if Cydia crashes on launch or you get a white icon – this means that a tethered boot is also required but is known as a semi-tethered boot as the iPhone can reboot without assistance but to be in a jailbroken state needs a tethered boot. The only iPhone that can boot untethered on this redsn0w/jailbreak is the old bootrom iPhone 3GS. Iphone-tethered-boot-apple-logo What boot-rom am I? Check your iPhone 3GS serial number, on iPhone – Settings General About Look for the Serial Number – if the 4th & 5th digits are below 40 you are lucky and have the old boot-rom.
![Firmware Firmware](/uploads/1/2/5/5/125523631/803249744.jpg)
What basebands are unlockable with Ultrasn0w? IPhone 4. 01.59.00 iPhone 3G/3GS. 04.26.08.
05.11.07. 05.12.01. 05.13.04.
06.15.00 The official basebands installed for iOS6 these are not unlockable. iPhone 5 1.00.16. iPhone 4S 3.0.04. iPhone 4 04.12.02.
iPhone 4 (CDMA) 3.0.04. iPhone 3GS 05.16.07. iPad3 2.0.02. iPad 2 (GSM) 04.12.02. iPad 2 (CDMA) 3.0.04 These are not currently unlockable with Ultrasn0w. If you mistakenly upgraded an unlocked/jailbroken iPhone via iTunes to a regular iOS update you will end up on one of these basebands and lose that unlockable functionality.
Epic Fails Obviously things in life do not always go to the plan, there are some variables that will hinder the process.