How to protect the back of your iPhone with only a bumper?

I just got the iPhone 5 so I'm new to the whole iPhone family (lol) and all my friends talk about the bumpers that they buy so I bought one off of amazon and just got it and I didn't realize it was just for the side if the phone so what else do I need to protect the back of the phone (I already have a screen protector on the front)

How to activate an IPhone 3G (or 3GS) when it doesn't want to?

This girl came up to me today with a IPhone 3G or 3GS (I can't tell) and asked me to activate it, I took it home and it was already on the setup screen like how you get when you restore it. I went through the steps and got to the activation part, I connected it to the Wi-Fi and tried to activate it, but about a second or two of processing, it says "Activation request could not be completed." Tried it again and again and it kept doing it. So I tried connecting to ITunes and the same problem on ITunes occurred. Can anybody help me out in activating it?

Does smiling makes a person more attractive? - 1

Girls keep telling me I would look even better if I simply just relaxed and smiled. I took these all in one sitting and no I'm not smiling (intentionally at least) or particularly relaxed.

I used a old-fashioned cell phone that doesn't have a great photo quality like iPhones

Does smiling makes a person more attractive - 1

Added (1). @GURLnext: no i don't have a girlfriend right now but i'm trying

Added (2). @Ivan: What do you mean?

My iPhone 4S fell in my pool?

I was in my pool listening to music on my float seat and then it tipped over and I fell in the pool. With my phone! I got it out in like 2 seconds and locked it, but I didn't turn it off until I got in my room. Its sitting in a bag of rice off, but the flash won't turn off even though its off! Do you think it will work if i leave it in there for a couple of days? If not, then how much does it cost to get a replacement?
( I don't know if I have warranty. My mom forgot to tell me I guess.) Thank you.

What is the expected battery life of an iPhone 4s?

If I only use it to play music during my journeys (one is 15 minutes and the other two are about an hour and a half), how long is my battery likely to last? I'm travelling by coach so I can't charge it, like I could on a train.