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how to downgrade an iPhone 4 to iOS 4!



Thanks to Ekster for sponsoring today’s video. Shop now and save up to 25% using offer code ICLASSIC at checkout: 

Links from video:

Link #1 – LukeZGD: https://github.com/LukeZGD/iOS-OTA-Downgrader/wiki/How-to-Use

Link #2 – IPSW: https://ipsw.me

Link #3 – powdersn0w: https://dora2ios.web.app/konayuki/index.html

CFJB currently tested and works on:

– macOS High Sierra
– macOS Mojave
– macOS Catalina

Alternative tools:

LukeZGD iOS OTA Downgrader (Linux Recommended): https://github.com/LukeZGD/iOS-OTA-Downgrader

How to make the best use out of iOS 4:
https://youtu.be/i1DyGlidnR4

Time stamps:
0:00 – Intro
1:10 – Getting started
1:55 – DFU Mode
2:32 – Creating custom IPSW
6:15 – Installing custom IPSW
9:10 – Setting up iOS 4
12:15 – Alternative downgrades
14:35 – Restoring back to iOS 7

Music from Uppbeat (free for Creators!):
https://uppbeat.io/t/nick-petrov/mellow-skies
License code: N64MB7FEIFPXKZUQ

A huge shoutout to dora2ios and all the developers for putting together these tools.

For business, please contact me@rohitsaini.ca

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21 Comments

  1. Hey, when the iphone turned on it showed the itunes logo with no unlock slider, i tried resetting it in itunes and it didnt work. How can i fix it?

  2. I try this and says cannot retrieve device serial number. Can’t continue, and my iPhone is stuck in a white screen, Doesn’t work,I don’t know what I’m doing wrong here, maybe because my 16GB iPhone 4 was brought after the iOS 6 release, I can’t downgrade to iOS 4 but iOS 6 and up only worked for me so I got so mad and planned to get another iPhone 4 and try the downgrade tool again with the different iPhone 4

  3. If you get the "serial number" error, it's because your iphone was bought after iOS 5 release. You can't downgrade to iOS 4 but iOS 5 and up will work perfectly

  4. Guys there is easier way to do this
    You have to have a mac os 10.12 higher recommend 10.15 ( also compatible with linux but not really good) and have legacy ios kit that way easier go watch youtube video on how to do it and you can downgrade now to iOS 4.0 to iOS 7.1.1 although iOS 4.2.1 is not functional but yeah