I have a Iphone 4 stuck in apple logo restarting over and over. I dont know what Firmware/baseband I have (phone is not mine).
Itunes dont restore. Tinnyumbrella doesnt show OS info.
I can enter/exit DFU/recovery mode.
So I need to restore with a custom IPSW (I think).
Can you point me the lastest tutorial to get the phone normally boot ?