Siri won't work on my iPhone 5?

Ok I just got the life proof case i'm not sure if has anything to do with that but when I went to use Siri it went to voice control? And not the normal silver button thing. How do i get it back or whatever. I'm not sure what's wrong with it?

Will I get charged for another activation fee?

I Accidently reset all the settings on my iphone and when it finally booted up it told me "waiting for activation" 2-3 minutes later "activation complete" I was wondering if I'm going to get charged another activation fee. (I have Verizon wireless)

IPhone 5 randomly won't turn on

I had my iPhone 5 in my pocket the whole day and at the end of the day, it wouldn't power on. It still had full battery. But, when I hit the home button & then the lock button, the screen wouldn't turn on.

How to stop my iTunes syncing with my Wife's iPhone too?

Can anyone help me please? My Wife, Son and I all have iPhones and we all share the one iTunes on a laptop. I have tried signing out of iTunes on the computer so that our iPhones don't sync as I have songs that they don't want of mine and vice versa but every time I plug their iPhone into the laptop, iTunes opens up and syncs all of my music to my Wife's iPhone… How do we stop this? Please help as this is annoying!

Added (1). We do all have our own Apple ID's too - wouldn't that make a difference?

Bluetooth on my iPhone 4 isn't working?

The bluetooth on my iPhone doesn't seem to be working, whenever I try to send something from my phone to someone else's it just says 'searching devices' for ages and it never seems to find anything. And when someone tries to send something to me it just says 'not paired' or something like that. Do you know how I can fix this? And how to send photos and songs through bluetooth from my iPhone to other phones.

What is a good international texting app?

My girlfriend of over a year is studying abroad in Spain for the next7 months. Right now we're using Vapor and it's alright but I was wondering if anyone had any other good suggestions. I need something that is completely free with no hidden charges. It's alright if Wi-Fi is needed, that shouldn't be much of an issue.

Btw, we both have iPhones.Me an iPhone 4S and her a 3GS