Am i old enough for a smartphone/iPhone?

I'm 16 almost 17. I have not gotten my first smartphone/iPhone. I have pretty much lived with a regular phone since. So am i old enough for a smartphone or should i wait until i'm at least 18?

Seawater Damage to iPhone 5c what can i do?

I went to the beach and was pretty far from the water, I was using my phone and would put it in my bag when I was done. I walked over to a friend to get more sunscreen when all of a sudden this huge wave took over all of our stuff including my cloth bag and phone. My phone still worked other than the speaker but we all know seawater is extremely damaging & my phone is basically done. I purchased my iPhone 5c from Verizon in October 2013, of course water damage isn't included in any warranties. How much would an out of warranty replacement cost? How do I know it's eligible for an out of warranty replacement? What else could I do if I'm not eligible for one?

Why can't people see my snapchat videos on my front camera?

When I try to send snapchat videos on my front camera, most people can't open them. I have to keep taking videos on my back camera in order for people to see them. At least all my friends with iphones can't open them. My friends with androids can. I have an android (xperia sp). Any reason why this is happening? And how I could fix this.