I was thinking along the lines of how the iPhone was first unlocked using blank sims. Older sims had a vulnerability that allowed the key to be easily bruteforc

I was thinking along the lines of how the iPhone was first unlocked using blank sims. Older sims had a vulnerability that allowed the key to be easily bruteforced. Unfortunately, it appears that newer cards have not been cracked yet, and can't be duplicated. I haven't been keeping up with this :)