You are mistaken, thinking the manufacturer would help the police. They never did, even with the courts involved. The police got access via hiring a hacking group, and paying the big $$$$$$$. rumor has it $250,000.000. possible a little more.
Just saying.
It was $1 million. . . and they were able to unlock just that single iPhone. They then started offering a package of unlocking to police and government agencies around to world to unlock that generation of iPhones. One iPhone for $25,000, Six iPhones for $100,000, etc. Then several months later, the company itself got HACKED and all their hacking tools and techniques were stolen by hackers. KARMA. LOL! The techniques were put out for anyone to use... but it required lots of hardware to do it. . . and would only work if you had the hardware. It was not a software hack.
It essentially required making multiple virtual copies of the iPhone to be broken into and then trying the potential passcodes. . . that's why it was so expensive. It really only would work on four digit passcodes or on six digit numeric passcodes that they might have hints were something easily guessable. Otherwise, it quickly became uneconomical on the six digit to do. One million virtual iPhones is crazy to try.
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And that was an older iPhone (4s?)...newer iPhones not susceptible to that hack. And now iPhone "X" is facial recognition only (passcode when that is turned off)...is the FBI going to force you to look at your phone? Keep your eyes closed...won't unlock w/eyes closed.