There's no diplomatic way to say this, but those who hold their cell phones with their elbows high and straight out to their sides have big egos (exceptions - see below). This is especially true when it's done in public and in crowds. It is a dominance display and it's rarely seen in women. It's typically seen in alpha-males with narcissistic tendencies, however it can also be seen in beta-males when there are women in close proximity to whom there is an attraction or if he feels the need to project confidence (e.g. constructive or nonconstructive criticism of a subordinate). But in these circumstances, this nonverbal signal is only temporary. If it's seen consistently, then it's a very reliable sign of an "excessive alpha", narcissistic personality. All the ladies out there take note - when the man in your life holds the phone this way - always approach with caution. In the business world - this is a sign that he will probably be very difficult to deal with. Despite what he may say, he will be thinking, "What's mine is mine, and what's yours is mine." Come prepared with a strong plan B in your back pocket.