I have an iPhone 5s with the latest version of iOS. The wireless (and bluetooth) card has stopped working (tested at the Genius Bar) just a couple weeks out of warranty. Apple wants $250+ to replace the phone.
I wonder if I can determine when the phone last connected to a wifi network? If I can determine that it has not connected to my home wifi prior to expiration of the warranty, Apple may have an obligation to replace the phone without charge.
Does a log file exist (and if so where can I find it) that would show the information I need?