I guess it depends what kind of business use you mean. It's easy to check and delete your emails, easy to see your calendar and set up recurring events and to see a list of all upcoming events, and I love the calculator so much better than any other cell phone calculator. Sometimes when I'm trying to type in stuff to text or surf the internet it doesn't always want to use the letter I'm telling it to use. Otherwise, I love my iPhone. Mine is 8GB and it seems like I have a lot of stuff stored on it with lots of room left.