iPhone Dev Team has released an updated version of RedSn0w 0.9.15b2 – software running jailbreak iOS 6 – which fixes some bugs for users of older devices Apple.
The main improvement of the owners affected iPhone 3GS, namely users of devices with the old bootrom – new build RedSn0w aims to address issues related to untether iOS 6. Now the owners of these models can “decouple” your gadget without any complications.
Update #1 (Oct 15): Version 0.9.15b2 fixes a few issues for 3GS owners: old-bootrom awesomeness is no longer forgotten directly after a restore, and iPad baseband upgrade/downgrade support is fixed (same production date cutoffs apply!). If your 3GS is currently tethered at 6.0 even though you have an old bootrom, just re-run redsn0w’s Jailbreak step (no need to restore). Don’t forget you can add some pizzaz with your own boot logo or a nerdy verbose boot.
RedSn0w 0.9.15b2 fixes several bugs for the iPhone 3GS: the version with the old bootrom are guaranteed untethered jailbreak iOS 6 immediately after a reboot. Furthermore earned feature upgrades / downgrades modem firmware from iPad (6.15.00). If you have iPhone 3GS with a tethered jailbreak iOS 6, and the device has an old bootrom, simply repeat the process of jailbreak using RedSn0w 0.9.15b2 (without having to restore). Do not forget also that you can always add a custom boot logo, using the “verbose boot”.
If you happen to be the owner of one of the earlier models of iPhone 3GS, then you can already enjoy the benefits of a full untethered jailbreak iOS 6, download Redsn0w 0.9.15b2 for Windows or Mac; the links are provided below, and using the instructions here. Detailed guide on how to use the tethered jailbreak iOS 6 for A4 devices can be found here.