My iPhone 15 Plus, purchased directly from Apple, is also bricked after update iOS 17.3 and I'm in a battle with Apple. Unfortunately, I never updated my data on my iPhone 15 Plus (because none of my previous iPhones ever failed) and recovering the data is crucial. I've been told that data recovery will cost from $595 to $1595 for the iPhone 15 Plus. Since I did nothing to damage my new iPhone 15 Plus, and it was working perfectly up until running iOS 17.3, I feel that Apple should be covering the cost to retrieve the data off the phone. Also, I've already been informed at an authorized Apple dealer that, at a minimum, my Midsystem chip needs to be replaced which will delete ALL existing data. Initially, I took my iPhone to the Apple store, but the service was so awful (none of my questions were not clearly answered) that I took the iPhone 15 to an Apple authorized dealer. The authorized Apple dealer already had Screens in stock, but even the new Display screen did not respond to touch. I've already invested a considerable amount of time trying to get the iPhone 15 Plus working and I'm using my still working iPhone 10 once again. Does anyone have any additional advice to offer on resolving my iPhone 15 Plus Brick problem caused after running iOS 17.3 update?