This post is very tricky. But I need to make a decision. I have an 5s and my girlfriend a 4s. We live in Argentina and it's difficult to buy here, but we are going to USA in May. I was thinking to buy a 6 and give her my 5s, but i'm not sure because the size and I usually buy the "s" edition. I don't trust in the first one. My first idea is to buy a 5c to my GF because the 4s will be useless the next year. And to buy this one is $300 cheaper than the 6. But, you know, is an old phone with an A6. At the same time, it is a 64-bit phone and it's LTE-enabled. So, here we are. What would do you recomend me ?