My minor was in English 40 years ago and I've noticed since then that the language has changed somewhat since Microsoft's Clippy came into being. But it seems to me you would use she only in that phone situation. If someone asked the question, "who is the best player on the side?" you should answer, "Number 14.". Pronouns cause too many problems with ambiguity. Besides, saying, "it is her" would require pointing at someone and my Mom told me you were not supposed to point.