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iOS Downgrade Tools - All in one place
#1
Information 
In order to make things easier, this thread is dedicated to all iOS downgrade utilities grouped by myself by iOS version so that you pick the right tool for the right job. The links are not mirrored, they represent the original links used by whoever created the tool.

Depending on your iOS device, your Jailbreak, your operating system, and other factors, you can choose between:

General iOS Downgrade Tools (Apply to most versions):

iOS 12.1.2 -> 12.0 iOS Downgrade Tools
iOS 11.4.1 -> 11.0 iOS Downgrade Tools
iOS 10.3 iOS Downgrade Tools iOS 10 General Nonce Setter:
  1. Add https://julioverne.github.io/ to Cydia.
  2. Install nonceset
  3. Copy your generator from your SHSH blob into the app.
iOS 9.3.5 - 9.3.4 iOS Downgrade Tools Manually setting the nonce on a jailbroken device:
  1. Install a mobile terminal or SSH into your device as root.
  2. Run nvram com.apple.System.boot-nonce= <your generator from blob>
  3. Test to see if the nonce is in the NVRAM by running nvram -p
  4. If everything went fine, you will see your generator in the output.
iOS 8.4.1 Downgrade Tools iOS 6.1.3 Downgrade Tools
DualBoot Utilities for 32-Bit devices:
 
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#2
you can also set your nonce in chimera or unc0ver
 
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#3
Are there tools to erase devices in recovery mode or dfu mode?
 
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#4
(07-02-2019, 02:02 AM)looha Wrote: Are there tools to erase devices in recovery mode or dfu mode?

It would probably be doable if we could boot a Ramdisk through iBoot via an Exploit, but no, other than an erase restore, no other option.
 
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#5
(07-02-2019, 02:10 AM)GeoSn0w Wrote:
(07-02-2019, 02:02 AM)looha Wrote: Are there tools to erase devices in recovery mode or dfu mode?

It would probably be doable if we could boot a Ramdisk through iBoot via an Exploit, but no, other than an erase restore, no other option.
Okay, just  an erase restore
 
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#6
Hi guys!

Is there a way to downgrade from iOS 12.3.1 (iphone 7) to 12.1.2?

Thanks.
 
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#7
(06-30-2019, 11:35 PM)GeoSn0w Wrote: In order to make things easier, this thread is dedicated to all iOS downgrade utilities grouped by myself by iOS version so that you pick the right tool for the right job. The links are not mirrored, they represent the original links used by whoever created the tool.

Depending on your iOS device, your Jailbreak, your operating system, and other factors, you can choose between:

General iOS Downgrade Tools (Apply to most versions):
 
iOS 12.1.2 -> 12.0 iOS Downgrade Tools iOS 11.4.1 -> 11.0 iOS Downgrade Tools
  iOS 10.3 iOS Downgrade Tools iOS 10 General Nonce Setter:
  1. Add https://julioverne.github.io/ to Cydia.
  2. Install nonceset
  3. Copy your generator from your SHSH blob into the app.
iOS 9.3.5 - 9.3.4 iOS Downgrade Tools Manually setting the nonce on a jailbroken device:
  1. Install a mobile terminal or SSH into your device as root.
  2. Run nvram com.apple.System.boot-nonce= <your generator from blob>
  3. Test to see if the nonce is in the NVRAM by running nvram -p
  4. If everything went fine, you will see your generator in the output.
iOS 8.4.1 Downgrade Tools iOS 6.1.3 Downgrade Tools
DualBoot Utilities for 32-Bit devices:

i have an iphone 5s on 12.13 and i want to update it to 12.4 but before that can i downgrade to it in the future and how ? am new here sorry if i asked dumb questions
 
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#8
(08-20-2019, 10:31 AM)Ven918 Wrote:
(06-30-2019, 11:35 PM)GeoSn0w Wrote: Removed for clarity.

i have an iphone 5s on 12.1.3 and i want to update it to 12.4 but before that can i downgrade to it in the future and how ? am new here sorry if i asked dumb questions

Downgrading is only possible in certain situations after the iOS version gets unsigned by Apple. You must have the SHSH2 blobs saved while it was still signed (you can do that by going to TSS Saver (tsssaver.1conan.com)) and SEP and Baseband components have to be compatible. They are usually compatible from a minor version to the latest, say from 12.1.2 to 12.4, but not from 12.4 to 11.x.
 
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