@arstechnica apparently it's because the Kardashians do it, so now everybody does it. Kardashians do it because it's necessary for the viewers to hear both sides of the conversation. The twats who do it everywhere now haven't figured out that nobody else needs to hear both sides of their conversations.
@robparsons @arstechnica this is the best explanation I’ve heard, too. And I think knit’s reasonable to generalize it to, the tv shows have to show the calls, they use speakerphone, and people are copying them. It’s in all shows now