UPDATED: 2025-07-01
- Reddit mirror: https://www.reddit.com/r/iOSDowngrade/comments/j1x7iv/downgrade_and_dualboot_status_of_almost_all_ios/
- GitHub Gist mirror: https://gist.github.com/LukeZGD/9d781f1b03a69fa46869384a9407a41a
- As of updating this post, there is now a free downgrade tool that utilizes a SEP exploit released for A9-A10X devices, turdus merula: https://sep.lol/
- Untethered with blobs guide: https://ios.cfw.guide/turdusmerula/
- Tethered guide: https://ios.cfw.guide/turdusmerula-tethered/
- Save SHSH blobs for signed iOS versions using TSS Saver or blobsaver