Its that time, where my kids are approaching the age where they'll be getting them cell phones, and so now I'm looking to buy some used iPhones. Obviously the price of the 5c is considerably less on Swappa then the 5s. What advantages do the 5s have (other then the fingerprint sensor) have over the 5c. I'm liking the idea of the 5c as their first phone but it may be so many versions down, that running the latest OS maybe a bit of a pain, i.e., too slow. Thoughts, opinions, recommendations?