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Welcome to the Legacy iOS Kit wiki.

What is Legacy iOS Kit?
Read the "How to Use" wiki page for usage instructions
Read the "Troubleshooting" wiki page for tips, frequent questions, and troubleshooting

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, jailbreaking, and using SSH Ramdisks are supported on the following devices:
- Supports all 32-bit iOS devices
- iPhone 2G, 3G, 3GS, 4, 4S, 5, 5C
- iPad 1, 2, 3, 4, mini 1
- iPod touch 1, 2, 3, 4, 5
Restoring with SHSH blobs and using SSH Ramdisks are also supported on some 64-bit devices:
- See SEP/BB Compatibility Chart for iOS versions that can be restored to
- iPhone 5S, 6, 6S, SE 2016, 7 (including Plus variants)
- iPad Air 1, 2
- iPad mini 2, 3, 4
- iPod touch 6, 7
Restoring with powdersn0w is supported on the following devices and target version range:
- iPhone 4 GSM - iOS 4.0 to 7.1.1 (all versions except 4.2.1)
- iPhone 4 CDMA - iOS 5.0 to 7.1.1
- iPhone 4S, 5, 5C, iPad 2 Rev A, iPad 4, iPod touch 5 - iOS 5.0 to 9.3.5
- iPad 1 - iOS 4.3 to 5.1
- iPod touch 3 - iOS 4.0 to 5.1
- Using powdersn0w requires iOS 7.1.x blobs for your device
  - No blob requirement for iPhone 4, iPad 1, iPod touch 3 (7.1.2 and 5.1.1 are signed)
  - For iPhone 5 and 5C, both 7.0.x and 7.1.x blobs can be used
  - For iPad 4, only 7.0.x blobs can be used
Restoring to other unsigned versions without blobs is supported on the following devices and target versions:
- iPhone 3GS - iOS 3.0 to 6.1.3 (all versions)
- iPod touch 2 - iOS 2.1.1 to 4.1 (all versions)
- iPhone 2G, 3G, iPod touch 1 - all versions
  - iOS 1 doesn't seem to work and may require usage of ZiPhone, more info here