Forward to now....I have not had this issue until my iPhone 11 pro max upgraded to 16.1.1. It worked fine until the last update, and now I am without my blood sugar readings. I bricked two sensors (not cheap) trying to figure this out. The sensor works on my wife's 2020 SE Iphone, which has not been updated to the .1.1. Anyone had any luck with this? Did anyone else have this happen with the latest IOS update? Is there a way to downgrade IOS to the last version?