I was on a thread about this issue that seems to have since disappeared. Immediately after updating to 15.4.1 I was no longer able to use my phone to read a continuous glucose meter and apple pay no longer worked. This was IMMEDIATELY after the update. I use my phone to read a medical device, as do millions of other people worldwide. Apple is pushing this technology for medical devices. I've done three factory resets - two at the store. When tested my NFC system says that it works. However, it no longer reads my device or Apple Pay at the cash register. From a variety of forums, I can see that this is an issue that is now frequently occurring when people update their operating system. My phone is less than two years old. I was offered no solution at the apple store other than purchase a new phone. It is quite frankly grossly unfair to suggest that I need to purchase a new phone due to a known issue. Apple is jeopardizing the health of millions of people who use wearable medical devices. Those who use