Well, it's what I would do if I was charged with compromising iPhones: start at the source. The only question is, how do you activate the tap?
Maybe it's activated via the SIM card. That's the easiest, and probably least well-known control channel for outside access. Most code does't expect the soft underbelly to be doing much.
Maybe it's activated via the SIM card. That's the easiest, and probably least well-known control channel for outside access. Most code does't expect the soft underbelly to be doing much.