Maybe it is time for you to upgrade to a phone with an integrated fingerprint sensor.
I have an iPhone SE. It has a fingerprint sensor. After I program a fingerprint it works for anywhere from a coupe of weeks to a couple of days, then quite working. Fingerprint sensing, like the phone-as-key, works very well for a few people, works some of the time for a lot of people, and is next to useless for a few people.
But more important to your reply: I should not have to buy a phone to match my car!!! I should be able to own the phone that works for me AS a phone. The number of times I need to unlock my phone (other than to try to control the car) is minimal. It's a phone, and it works as a phone. I would not have bought this car if it had required me to buy one of those awkward oversize phones. My phone is an excellent PHONE. It's great that Tesla provides the app for people who want to do that kind of stuff. But eliminating the fob makes it outrageously awkward for many of us to do simple things that a fob would do flawlessly and easily. Like opening the frunk. And try f#@%ing around with your phone to open the frunk with your hands full of grocery bags!