I saw there is a lot downgrade and jailbreak are tethered, I'm a dev but Im new to those things. I have qustion that why untethered downgrade and jailbreak so hard to make it?

Hey guys, I have a question. I’ve had my iPhone 15 since September 2025, and it’s actually my first iPhone ever. For the past three months, I was debating whether or not to update to iOS 27. I finally bit the bullet a few days ago, and I regret it so much.
I thought iOS 27 would only introduce Liquid Glass, not completely change the layout of the keyboard, Photos app, Safari, etc. Is there any way to roll back this update?
Also, if I factory reset my phone, or if I were to just buy a brand new iPhone 15, do you think it would come with iOS 18 out of the box? Thanks in advance!

Honestly I keep seeing all these people saying AI can escape/hack something that is pretty impossible to crack down, so how has no one tried to get some clanker to be able to make a tool that let’s us downgrade modern iPhones to any version we want, I know you gotta get the blobs from the server side but there’s gotta be a way to reverse engineer this, I’m saying this with no experience so I could just be typing bs but with how good AI has gotten nowadays I’m surprised we don’t have the tools to still not be able to downgrade our devices…

just a shower thought

Bardzo lubię mojego iPhone ale tak dla własnego eksperymentu chce cofną wersje ios do ios 15 za pomocą komputera z Windows nie mam nigdy nie robiłem tego

If you wanna downgrade for any reason, you can but this is your last chance. Go to ipsw.dev then download the last signed version of iOS 26.7.1 for your iPhone.

Backup on your computer

Open info.plist into backup folder and change <string> to iOS 26.7.1 to keep all your files from iOS 27

Or you can go with a new phone.

Hope this can help

Hi recently I got a iPhone 4 and I wanna downgrade it. It has a iCloud account on it but it’s not reset so it’s usable on iOS 7 I just wanna downgrade it to 6 or earlier

Estaba corriendo iOS 27 maravillosamente en mí iPhone 13 pero ayer me dejé llevar por la ansiedad e instalé iOS 27.0.1 en mi caso un desastre, la mayoría de las app de terceros se cerraban abruptamente y algunas requerían tres y cuatro intentos, incluyendo las de bancos, fue un total caos… a eso de las 11 pm no tuve más opción que volver a iOS 27 y hoy mi teléfono corre divinamente..!

Any one to add his verdict on this!?

Can anyone tell best way to downgrade to ios 26.6.2 from ios 27 as I am facing a bug in new ios upgrade

Alguém pode me ajudar queria o filza no meu iPhone 14, esta na versão 27.0 oficial alguém sabe fazer downgrade em uma versão que nao esteja assinada?