Personally, I keep my phone not in my pocket, but in my bag with the rest of my connectivity gadgets. When it’s charging on the wall, there’s a pretty good chance its in Airplane mode and I’m elsewhere.
When the telephone was first introduced, it was a synchronous medium. Today – with voicemail, text messages, and the like, it is much more of an asynchronous medium. Giving us the power to use it on our terms.