Lots of activity happening on the iPhone scene overnight. 2 new tools have been released that downgrade your boot loader to 3.9fb - fb stands for fake blank, the unique thing here is that this is a customised boot loader and can be software upgraded to 4.6.
Unfortunately those who have used Ziphone and downgraded to BL 3.9 are stuck. BL3.9 cannot be software upgraded at the moment. So those with 4.6 should use these new methods to unlock and enjoy the best of both worlds, upgradeable boot loader and new baseband.
iPlus by aviegas
Software Unlock - Hackint0sh
iphone-tools by SoLoR [BL3.9/BL4.6] Downgrade to 3.9 now, and software upgrade later ! - Page 16 - Hackint0sh
Both of these tools are just a day old and have some rough edges so I would suggest read up and wait for some user reports before using them. But don't downgrade boot loader from 4.6 to 3.9 now so use ziphone carefully.
Unfortunately those who have used Ziphone and downgraded to BL 3.9 are stuck. BL3.9 cannot be software upgraded at the moment. So those with 4.6 should use these new methods to unlock and enjoy the best of both worlds, upgradeable boot loader and new baseband.
iPlus by aviegas
Software Unlock - Hackint0sh
iphone-tools by SoLoR [BL3.9/BL4.6] Downgrade to 3.9 now, and software upgrade later ! - Page 16 - Hackint0sh
Both of these tools are just a day old and have some rough edges so I would suggest read up and wait for some user reports before using them. But don't downgrade boot loader from 4.6 to 3.9 now so use ziphone carefully.