Wifi calling works during flights

[Gathomblipoob]

Any type of voice calling in flight is prohibited per American Airlines. This means Skype, Facetime, Wifi calling, etc. Not sure if this rule extends to other airlines; it doesn't seem to come from the FAA.

I'm only bumping this because I accidentally received a call in-flight while I was in airplane mode, today. If Wifi calling works in airplane mode, then wouldn't it make sense to keep your phone in airplane mode while you're at home or elsewhere with a secure/dependable wifi signal to save on battery life?

Good. Flying American on Tuesday.