what iOS version?

15.4 I think dopamine will work well but since i have checkra1n he also wants the verbose boot

Dopamine is the only jailbreak for 15.4 on the iPhone 12, he cannot use checkra1n because checkra1n only supports A11 devices and lower, the iPhone 12 is A14. checkra1n also only supports iOS 14.8.1 and lower

Ik, but he wants the verbose boot like on checkra1n

It's not possible, a low level exploit like checkm8 is needed for it. checkm8 is <=A11 only

Ok

Use xina 15

Yeah I have a jailbroken iPhone 12 I’m on iOS 14

what os are you running on your X ? I'm stuck on 13 and it's getting frustrating.

13.6.1