That's not the point. The point is the judgement of the answers to "how do you improve the phone" are totally subjective. Maybe as the interviewee I guess you want some crazy answer like "well we could built it into your car" but what you really wanted was proof that I wouldn't waste time on this but instead focus on getting stuff done.
As an aside, IMO smartphones are not an improvement on phones. They are an improvement on PDAs. As phones they've utterly failed. People called each other (as in use a phone) way more before smartphones. So smartphones are not better "phones". They're worse phones and better something else.
As an aside, IMO smartphones are not an improvement on phones. They are an improvement on PDAs. As phones they've utterly failed. People called each other (as in use a phone) way more before smartphones. So smartphones are not better "phones". They're worse phones and better something else.