Blue speech bubble next to some contacts?

When picking a contact to message on my
iPhone, there are certain contacts who have a little blue speech bubble next to their name. At first, I thought it was people who could iMessage but not all of my iMessage contacts have it. Does anyone know what it means?

My iPhone alarm clock turns off by itself?

It's really annoying, since I need it to wake up for school and work. I usually have a double alarm going and both usually shut off. I turn that switch on the side of the phone that's orange to silver, and I make sure the volume is all the way up. I have a 4s. Any idea how to fix it and why it does this?

IPhone 5 insurance claim

I dropped a weight on the back of my iphone 5 accidently, the phone now has a dent on the back and can't be repaired by a local phone repair shop. I have taken out insurance on it which includes accidental damage. Should I tell the truth or will they be fussy about it?

Why doesn't the computer work unless my Iphone 4s has Safari open?

As the title says, I have a fairly new computer, 8mb broadband (unlimited) working over a wired connection. It will not work (nothing loads, facebook, yahoo, youtube) and it even says I'm not connected to Skype any more. However, when unlock my iPhone 4s and open the safari browser, it works on my computer. My phone is not acting as a hub as it is not connected to my PC and the 3G is not enabled, however the Wi-Fi is. I was wondering if anyone had encountered a problem similar to this before, and if so, how did they fix it?

IPhone 4s weird thing on the top?

My mate has this weird silver thing sticking out the top if her iPhone where he earphones should be plugged in. Its square shape i think. What is it?

Why won't any of the apps on my iPhone work?

I tap an app and it just… Does nothing. I tap other apps like iMessage, Instagram, Facebook, mail, and nothing happens. Even when I press the lock button, nothing happens. What can I do? Also, it's an iPhone 5 and it's not jailbroken or anything like that.