Just get an iPad mini and be done with it!
I don't understand why people keep saying this. A 7.9 tablet is a huge different from 4.7-5.0 inch phone. The iPad mini doesn't fit in your pocket while a 4.7" phone does. The mini doesn't do voice call, etc. The list goes on. Some people (like me) just prefer a slightly bigger phone that run iOS. What's wrong with that?