Ausha1 / cppst0rm

iOS Tethered Downgrader/Booter

cppst0rm

A more automated and mainstream version of Mineek's Sunst0rm (https://github.com/mineek/sunst0rm)

Note to all users who encounter any issues: DO NOT open any issues in futurerestore. Whether that be on Discord, or GitHub, this program does not use futurerestore incorrectly, and issues with futurerestore are unlikely. Instead, get support in cppst0rm's Discord server.

Since this program is so automated, I felt not the need of a guide, but if any help is needed, please refer to cppst0rm's Discord server for further help if the usage guide doesn't make sense to you.

Things to Undrstand

• This utility uses a checkm8 exploit to downgrade your device tethered. This means that every time your iPhone turns off, whether that be shut down, restarting, battery dying, or whatever, you have to use this program to turn it back on.
• On A10 - A11 devices, crucial functionality like the Home Button, Audio, Micraphone, and Vibration DO NOT work at the moment.
• On iPhone X, the touch screen does not work after downgrading, but the iPhone 8 and iPhone 8 Plus are fine.
• You should NOT do this to your main device. The downgrade is not exactly stable since there will be some issues. For example, on the iPhone SE 1st generation (iPhone8,4), the Compass, Dication/Siri, and flashlight have some issue related to them. In my case, Siri, Dictation, and the Compass did NOT work at all, while the flashlight's only issue was a delay from pressing the button in control center.

Requirements

• An INTEL mac, M1 Macs are NOT supported yet.
• A compatible iPhone
• Basic knowledge of the mac terminal

Build cppst0rm

• To get the cppst0rm executable, open a Terminal window, cd into your cppst0rm directory, and type make

Usage

Option	Description
-i	path to ipsw.
-t	path to shsh2 blob
-r	restore mode
-b	boot tethered (use this every time to boot)
-d	specify board config (Ex. n69ap)
-id	specify iPhone identifier (Ex. iPhone8,4)
--kpp	Use this argument if the iDevice you are handling has an A9 chip or lower
--legacy	Use this argument if you are restoring or booting iOS 11 or below
--skip-baseband	Skip the baseband while restoring through futurerestore
-rb	Remove the boot folder for your device and create a fresh one

To Restore

./cppst0rm -i [path to ipsw] -t [path to blob] -r -d [boardconfig]

• Use --kpp if your iDevice has an A9 chip or lower, otherwise leave it out
• You can find your boardconfig (here)[ipsw.me]. Just click on your category, find your device, and hit the Device Information tab.
• Since the process of patching files from the ipsw requires specifying if kpp is required, make sure you really need --kpp or not

To Boot

./cppst0rm -i [path to ipsw] -t [path to blob] -b -d [boardconfig] -id [identifier]

• Use --kpp if you did while restoring or if your device has kpp

Known issues

• During restore, macOS says it cannot verify the identity of any of the binaries -- Fix this by opening up the "Dependencies" folder, and right clicking on each of the binaries and hitting open on every one of them. Re-run cppst0rm, and your problem will be fixed!

Credits

M1n1Exploit - Some code from ra1nstorm

Arna13 - Writing an easy to understand guide

swayea - Logo's

Sunst0rm - The backbone for this repository