How to change my address an Iphone?

So I changed address for my phone and I know that usually they give you a bill in the mail (atleast that's us what I think I've never purchased an app before and I remember setting up and Apple ID and it asked for my address to bill stuff) I want to purchase an app but I don't know if I will be billed for it.

I wanna buy iPhone 4s. Is it the right choice?

I found that, iPhone 4s is very costly (like every Apple product), but is it worth to buy a phone that costly? Or, am I doing a wrong selection to spend too much on a phone?
No abusive/funny answers please

How to downgrade from iOS 7 to iOS 6 on an iPhone 4S?

I updated my sister's iPhone 4S by downloading the torrent for iOS 7.To download this, I used the "Check for Update" button, pressing "shift" and right clicking on it. From there I selected the iOS 7 file and it started installing to the phone. However, during the downloading process, an error occurred. The only option was to restore the phone, so I did. The phone restored with iOS 7 software and will now not allow me to do anything with it. After trying to access the phone, a screen shows up saying you must be registered as part of the iPhone Developer Program. My question is, is there a way to delete the iOS 7 software and replace it with the iOS 6 that was formerly on the phone. (If at all helpful, I can't gain access to the page that allows you to look for updates/restore the phone again)

I bought a verizon iphone 4 the other day.and i tried to activate it?

I bought a verizon iphone 4 the other day. And i tried to activate it and verizon told me that i couldn't activate it because its already activated with another account. What am i supposed to do? They said that the phone was already unlocked so i'm supposed to be able to use whatever carrier i wish but i'm so confused and i need answers FAST. How can i get this phone working under my own account? I can't put a sims card in it because it doesn't have a sim slot

Is owning an apple product a status symbol?

Some of the people I've talked to compare iphones, macs, ipads etc as a mercedes benz or lexus. They described android or PCs etc as a honda or toyota

They said driving a luxury car is a status symbol. The cars are nice yet
driving a honda or toyota does the same stuff but without breaking the bank.

What do you think?

Added (1). The analogy wasn't for a comparison. It was a metaphor. I'm not saying ipads are priced the same as a Mercedes but rather apple is becoming as much of a status symbol as owning a luxury car.

Added (2). @Maia I totally agree. I was reading an article earlier today and it was talking about how much profit apple has made off their products. It was 54% profit margin last year!

What's the best iPhone to get: 4, 4s, or 5?

This is going to be my first smartphone and I know I want an iPhone, but which one should I get? I have a friend that has the 4 and loves it, my sister had the 4s and loves it and I know a few people that have the 5 and love it, so none of that really helps. I'd use it for mostly texting and occasionally playing games but not much calling, if that has anything to do for which choice is better. Any suggestions?