When I got out my laptop to compare to her PC the other day, it was still running 10586.218 & had the Airplane Mode button. I concluded since the button was missing on her PC with 10586.318 that Microsoft had gotten rid of the feature, at least on PCs. My laptop did not update until the next day & I did not realize the button still existed in 10586.318 until laying in bed Thursday night, DING !
We took my girlfriend's PC back to her house Thursday & I will ask her to double check. I'm pretty sure the Airplane Mode button is completely missing & not just grayed out. Else, why would I think the feature was discontinued in her, the latest, version of Windows 10 ? I bring this up because my web searching, so far, reveals problems related to a grayed out Airplane Mode button. I'm still looking for my first missing Airplane Mode button posts.