My battery is dying...
So for the first time ever, I'm considering getting a "smart" phone. I got an e-mail from Verizon with some time-sensitive deals and one of the phones they're offering has what most smart phones don't, and that's a removeable battery. Which means that if the battery dies, you don't have take or send in the whole phone just to get a new battery. It also has 32 GB internal memory with an SD card slot that could handle up to 2TB! My Samsung tablet (which is only a year and four months old) only has 16 GB internal, and can only support a 128 GB card.
A miracle of modern technology. 
Our new phones are unlocked, meaning they can be used with any phone server. I much prefer Keith's Samsung Galaxy Edge but it is huge. I know a lot of people that have the small iPhone because of the size, which I know is important to you. The small Samsung phone wasn't as nice as the iPhone.
I suggest you play with the phones before buying one.