Android: Swipe down from the top of your screen -- to access the Quick Settings panel -- and then tap the Airplane mode icon.

Google's Phone app is the default calling app on many Android devices, including the latest Pixel phones. It isn't challenging to use and offers a clean and user-friendly interface. However ...

As I can testify from my recent problems with ... a customer service rep (after maneuvering their dumb online questions that didn't even pertain to my problem). Four reps and four phone calls ...