better-sunst0rm

iOS Tether Downgrader for 64-bit checkm8 devices, based on the once legendary sunst0rm, by mineek.

Based on mineek's guide, with a lot of changes

/!\ Using this tool on A9 devices or newer is NOT recommended at all, at this is considered "obsolete" (it will probably not work with newer iOS versions). Instead, use downr1n (tethered downgrades) or dualra1n (tethered dualboots), those are maintained projects. Using better-sunst0rm on A7/A8 devices is fine though.

/!\ Using the dev branch is also not recommended, because I don't maintain it.

Notes

• It is a tethered downgrade meaning you will have to boot tethered every single time from your PC if your battery dies or if you reboot your phone.
• On A10-A11 devices crucial functionality such as the Home Button, Audio, Microphone, Vibration does NOT work at the moment (and probably never will, because other tools already fix this).
• On iPhone X touch doesn't work but iPhone 8 and 8 Plus are fine.
• You should NOT be tether downgrading your main device, it is only recommended to tether downgrade a second device.
• For some frequently asked fixes go here for help.

Installation

1. Install the latest version of Python. (the bundled version of Python in macOS has issues with better-sunst0rm)
2. Clone the git repo (git clone https://github.com/rastiqdev/better-sunst0rm)
3. Install the pip requirements (pip3 install -r requirements.txt)
4. Done!!! :)

How to use?

Option (short)	Option (long)	Description
-i IPSW	--ipsw IPSW	Path to IPSW
-t SHSH2	--blob SHSH2	Path to SHSH2
-r	--restore	Restore mode
-b	--boot	Boot mode
-d BOARDCONFIG	--boardconfig BOARDCONFIG	BoardConfig to use (E.g: d221ap)
-kpp	--kpp	Use KPP (A9 or lower)
-id IDENTIFIER	--identifier IDENTIFIER	Identifier to use (E.g: iPhone10,6)
	--legacy	Use Legacy Mode (iOS 11 or lower)
	--skip-baseband	Skip Baseband sending, do NOT do this if your device does have baseband this argument is only ment to be passed when your device does not have baseband such as WiFi only iPads.

Restoring

python3 sunstorm.py -i 'IPSW' -t 'SHSH2' -r -d 'BOARDCONFIG'

• Use --kpp if you have KPP, otherwise don't add
• A10+ Devices do NOT have KPP so do not add --kpp if you are attempting to tether downgrade an A10+ device, A7-A9X devices does have KPP so that means you will pass --kpp and to clear things up having KPP or not does not change the fact if you are able to tether downgrade your device.

Booting

python3 sunstorm.py -i 'IPSW' -t 'SHSH2' -b -d 'BOARDCONFIG' -id 'IDENTIFIER'

• Use --kpp if you have KPP, otherwise don't add

./boot.sh

Credits:

sunst0rm

M1n1Exploit - Some code from ra1nstorm

Arna13 - Writing an easy to understand guide

swayea - Logo's

better-sunst0rm

rastiqdev - Me! Adding the required fixes for sunst0rm to still work today.

m1stadev's wikiproxy - iBSS/iBEC IV/Key grabber's code (modified so it uses some already installed pip modules)

edwin170's downr1n - Dependencies and futurerestore downloader