I have an iPhone 4s that is set up with my personal iTunes account. I also have an iPhone 5 provided by my employer that is set up with my work iTunes account. The two accounts have different user IDs. In iTunes, I can log on using either user ID and have access to what is on the phone tied to that user ID. I would like to consolidate what is on my iPhone 5 with my 4s, since I must return the iPhone 5 to my employer. Is there some way that I can do so?