Hedging machine means that the serial number of this machine has been guaranteed to others before, and it is a disposable mobile phone in its own hands. The motherboard is broken and the camera is not guaranteed.

If, when starting a second-hand iPhone, you encounter a situation that the newly released model prompts that the warranty period has expired, don't panic. This kind of mobile phone has a high probability of being a "condom machine". In fact, this situation has no impact, except that someone abroad changed the serial number of this phone in order to exploit the loophole of Apple's warranty policy, and the machine is still a normal iPhone.