People are way too addicted to their phones. If you can't put it down for the minute it takes to pee, you have a problem.
I've noticed this in person with another guy that works in my building recently. In the past 2 weeks, he and I went to use the restroom nearly about the same time. When I ran to him at the sink, we talked a bit then he headed to urinal to pee, as soon as he had his cock out, he pulled the iPhone from his back pocket and watched some kind of Youtube video, I was at the next urinal (with a divider) and can clearly hear the videos, the moment he's done urinating, he put the iPhone back into his back pocket. The first time I noticed that I didn't think of anything, but I ran into him 2 times last week and noticed the same pattern, when he's at the urinal -- cock out, iPhone out, cock in, iPhone in.
For me, there were a few times when I was at the urinal and my phone ran and I had to answer, I'd answered it right there and continued the conversation even when I was at the sink wash my hands. But that was when I was alone in the Men restroom and not concern of the phone conversation being over heard.