I am getting ready to upgrade my smartphone and I am looking for input on the best smartphone for business. I currently have an iPhone 4. I haven't really had any problems with it but I think I would like to get away from the iPhone. I've pretty well narrowed it down to the Blackberry Z30 and the Samsung Galaxy S5. I'm having trouble picking between the two but I am also open to other suggestions. What does everyone use? What are the advantages and disadvantages of the phone you use as it relates to running your business? Thanks!