Legacy iOS Kit

(formerly iOS-OTA-Downgrader)
A multi-purpose script to save SHSH blobs, downgrade/restore, and jailbreak supported legacy iOS devices
Linux, macOS, and Windows are supported
- Windows usage is not recommended
Read the "How to Use" wiki page for usage instructions
Read the "Troubleshooting" wiki page for tips, frequent questions, and troubleshooting

Features

Restore to iOS 8.4.1 or 6.1.3 on supported 32-bit devices (OTA signed)
Restore iPhone 4 GSM (iPhone3,1) to unsigned iOS versions (powdersn0w)
Restore to iOS 10.3.3 on supported A7 devices (OTA signed)
Option to jailbreak iOS 6.1.3 and 8.4.1 restores
Restore to unsigned iOS versions with SHSH blobs
Restore to unsigned iOS versions with iOS 7.1.x blobs (powdersn0w)
- Device support is limited, see below
The latest baseband will be used for 32-bit devices if applicable
Place device to pwned iBSS/kDFU mode for 32-bit devices
Clear NVRAM for devices that support powdersn0w
Restore iPhone 4 to iOS 7.1.2 with the option to jailbreak
Restore supported devices to their latest iOS version
Save onboard and Cydia SHSH blobs for 32-bit devices
Boot SSH Ramdisk on supported 32-bit devices
Pwning supported iOS devices using limera1n or checkm8 with iPwnder/gaster
Device activation using ideviceactivation on Linux

Identify your device here
iPhone 5C and iPad mini 3 devices are NOT supported by OTA downgrades
- These devices still support restoring to other iOS versions with SHSH blobs, see below
See the table below for OTA downgrading support:

Restoring with SHSH blobs and using SSH Ramdisks are supported on the following devices:
- Supports most 32-bit devices (iOS 3 to 10, version range depends on device)
- iPhone 3GS, 4, 4S, 5, 5C
- iPad 1, 2, 3, 4, mini 1
- iPod touch 3, 4, 5
Restoring with SHSH blobs is also supported on most A7/A8 devices:
- See SEP/BB Compatibility Chart for iOS versions
- iPhone 5S, 6, 6 Plus
- iPad Air 1, mini 2, mini 3
- iPod touch 6
Restoring with powdersn0w is supported on the following devices:
- iPhone 4 GSM - targets iOS 4.3 to 6.1.3
- iPhone 4S, iPhone 5 (not 5C), iPad 2 Rev A, iPod 5th generation - targets iOS 5.0 to 6.1.3, 8.0 to 9.3.5
- Using powdersn0w requires iOS 7.1.x blobs for your device

curl
bspatch
powdersn0w_pub - dora2ios; LukeZGD fork
ipwndfu - axi0mX, Linus Henze, synackuk; LukeZGD fork
ipwnder_lite - dora2ios (used on macOS)
iPwnder32 - dora2ios (old version with libusb, used on Linux)
gaster - 0x7ff
daibutsuCFW - dora2ios; LukeZGD fork
libimobiledevice - libimobiledevice
libirecovery - libimobiledevice
libideviceactivation - libimobiledevice
tsschecker - tihmstar; 1Conan fork v413
futurerestore - tihmstar;
- LukeZGD fork used on Linux for restoring 32-bit devices
- LukeeGD fork used on Linux/Windows for restoring A7/A8 devices
- futurerestore v259 used on macOS
iBoot32Patcher - dora2ios fork
idevicerestore - libimobiledevice; LukeZGD fork
idevicererestore from daibutsuCFW (used on custom IPSW restores for A5/A6 devices)
kloader from Odysseus
kloader from axi0mX (used on iOS 4/5 only)
kloader_hgsp from nyan_satan (used on h3lix only)
partial-zip
zenity; macOS/Windows builds
32-bit bundles from OdysseusOTA, OdysseusOTA2, alitek12, gjest (modified bundles for daibutsuCFW)
A7 patches from MatthewPierson
iPad 2 iOS 4.3.x bundles from selfisht, Ralph0045
EtasonJB
Pangu
p0sixspwn
unthredeh4il
SSH Ramdisk tar from SSH-Ramdisk-Maker-and-Loader
Bootstrap tar from SpiritNET