my iphone 7 is completely unreliable as a key. It works maybe 65% of the time and seems almost random when it does. I've tried bluetooth resets, resetting the Tesla software by holding in both steering wheel buttons, rebooting my phone, etc. The service department at the local deal told me its an iphone problem caused by a recent Apple update. I'm skeptical. My phone is provided by my employer and has various security program on it. To reset it would be a time-consuming undertaking requiring the IT group at work to help out. Before i go down this path, it would be helpful to know whether resetting the phone to factory defaults actually solves the connection problem and produces total reliability of the phone as a key. Anyone tried it?