MuscleNerd promised a few days ago that he will release a new version of redsn0w that will solve the problems regarding baseband downgrade of iPhone 3G/3GS terminals and this happened last evening. redsn0w 0.9.14 beta 2 is now available for iDevice owners, and with its help the 06.15.00 baseband of the iPad tablet can be downgraded, but only for terminals where redsn0w 0.9.14 beta 1 did not work. It is important to remember that the baseband of the iPad tablet DOES NOT WORK with the iPhone 3GS terminals released after the 24th week of 2011. More specifically, the iPhone 3GS terminals that have the serial number (you can find it in Settings>General>About>Serial Number) the first 5 digits in a construction like this xx134 or higher I cannot install the baseband 06.15.00 of the iPad tablet because the terminal will be permanently damaged because this baseband cannot be installed on those devices.
To downgrade the 06.15.00 baseband to the 05.13.04 baseband you can use this tutorial, but you just have to open redsn0w, press the jailbreak button, choose the downgrade baseband option and enter the terminal in DFU Mode. If you have already downgraded, it is not necessary to repeat the process.
- Connect your iPhone in normal mode, then click "Jailbreak" after redsn0w identifies its model and BB version (you don't need to pre-select the IPSW anymore).
- Choose the "Downgrade from iPad baseband" option (you needn't worry about de-selecting Cydia anymore).
- Do a controlled "slide to power off" shutdown of your phone and proceed through the normal DFU ramdisk steps.
Because many users complained about not being able to enter their terminals in DFU Mode, the Dev Team implemented in redsn0w 0.9.14 beta 2 a new function called DFU IPSW. This function allows you to enter an iDevice in DFU Mode using an ipsw, and without touching the physical buttons. This function can only be used with ipsws that are signed by Apple, so iOS 4.2.1/5.1.1 and is not compatible with iPhone 4S, iPad 2 and iPad 3.
In redsn0w, go to "Extras->Even More>DFU IPSW" and select an IPSW that is currently being signed for your device and that you'd normally be able to restore to without any hacks. redsn0w will create an "ENTER_DFU_" version of the IPSW that you can restore to just like any other IPSW, except that now you'll be dumped into DFU mode towards the end of the restore (WARNING, your screen will remain completely black...the only way to even know its own is that iTunes and redsn0w will detect it!). The technique used by this feature is 3 years old but surprisingly still works today!
You can download redsn0w 0.9.14 beta 2 available here.
