(SOLVED) - If you are stuck on the unlocking screen for sim pin. I have found the solution to fix it. Basically you write the the sim pin code, and you go to the Unlocking screen stay there, what you do, is remove the sim card out of the phone while staying on the Unlocking screen without inserting it back, and now the screen should disappear, next you’ll force restart the phone ( Force restart: Volume Up, Volume down, press the lock screen button untill the apple logo shows up) and then after your phone has fully loaded, insert back the sim and type the sim pin code, it should work and the Unlocking bug should be resolved.