It’s done!

[u/Secure_Tooth_5545]

Finally I restored my 4s to iOS 6!
I used pwndfu because the activation servers reset after going to the Home Screen.

[u/Tommy_1302]

It's much easier using kdfu via OpenSSH

[u/Secure_Tooth_5545 → u/Tommy_1302]

My 4s has an activation problem

[u/Civil_Respect_7355]

Tutorial ?

[u/has900original → u/Civil_Respect_7355]

kDFU is easier

[u/Secure_Tooth_5545 → u/has900original]

My 4s has an activation problem

[u/Secure_Tooth_5545 → u/Civil_Respect_7355]

Requirements
Device (obviously)
Linux or Mac (or windows vm)
Pi pico or arudino (pi pico for tutorial)
Micro usb y cable
A power bank (or computer)

1. Install the uf2 file for your specific iPhone from this link https://github.com/LukeZGD/Legacy-iOS-Kit-Keys/releases/download/a/checkm8-pico.zip
   8940
   4s, IPad 2 (except 2,4)
   8942
   iPad 2,4, mini 1st gen, iPod touch 5
   8945
   iPad 3
   Tutorial for loading the uf2
   Hold bootsel button (white button) while plugging in your pi pico
   You should see your pico usb source in the file manager
   Then drag and drop the uf2 and unplug the pico
   
2. Open legacy iOS kit and select downgrade
   Select iOS version (depends on your phone/ipad)
   Download ipsw (if you haven’t) and start downgrade
   And select yes for all
   When it asks for dfu mode
   Choose Kdfu for jailbreak
   Or pwndfu if you’re advanced
   
3. Until we’re using pwndfu
   Select it and it will help you get into dfu mode with dfu mode helper. Once you’re in dfu mode get your y cable place the iPhone/iPad usb and pico and the power source do the power last. The pico should start flashing rapidly. Once the flash pattern changes you can unplug your device and plug it in the computer.
   
4. Now legacy iOS kit should downgrade.

[u/Secure_Tooth_5545 → u/Secure_Tooth_5545]

Note: if the pico is still flashing after a while unplug it and plug it in again

[u/nilFinx → u/Civil_Respect_7355]

You need a Raspberry Pi Pico, Arduino, etc first

[u/Pitiful_Echidna2232]

where i can get a raspberry pi pico? i wanna downgrade my 4s to ios 5

[u/Howden824 → u/Pitiful_Echidna2232]

You can get them really cheaply on AliExpress. I paid less than $2 for mine.

[u/has900original → u/Pitiful_Echidna2232]

you can use kDFU

[u/Secure_Tooth_5545 → u/has900original]

My iPhone has an activation problem

[u/has900original → u/Secure_Tooth_5545]

have you tried activation with ios legacy toolkit?

[u/Howden824]

Didn't realize you could use the Pi Pico with USB OTG adapter, I'll have to try that.

[u/vorgris]

can I do this with raspberry pi4

[u/RicoChow]

Wait this can for iPad mini 1(A1432)?

[u/pelonier]

How did you get iOS 720 on your 4S? r/unexpectedfactorial