How to update emojis on iPhone?

I have the iPhone 4s and I had emojis for a while but I want to update them. I went to the app store and updates it/ installed it but it didn't show up updated when I go to type something. So do I need to change something in settings? I tried turning it off and on again but that didn't work…

Restoring iPhone and backing it up?

-Well my iPhone 4S has been going in and out of 3G to the no service circle a lot lately so I've read it's Apple recommended to restore your iPhone.
-Now, my iPhone is backed up on my computer, but my question is, when I restore my iPhone back to factory default, am I still allowed to back it up after the restore so I don't lose all my contacts (300 contacts), pictures, etc.
-Idk I'm a total noob when it comes to backup and restore for the iPhone: p.

IPhone 4. And 2 year contracts?

My mom's birthday is coming up and we thought that for her birthday we would get her an iPhone 4. We don't know when her next two year upgrade is but I was Wondering if I could get the phone now for the price that i would get it if her upgrade was now, and not hook it up to her number yet, and then when she got her upgrade she could use it? Without the upgrade it's about $500 but with it it's $0.So I really need to use the upgrade obviously! Any known information helps.

Can't update applications on iPhone?

Everytime I try to update any application on my iPhone, something will pop-up asking for the password of an email I don't even recognize. And not just one but 3 different emails. Some application will asks for the password of a particular mail and so on. Why is this happening? Is there any way I can get rid off those other emails except from my Apple ID?

My video/camera doesn't work on my Iphone 4?

I tried everything… Restart. Reset. Restore. Doesn't work. I even restored my iPhone as a new phone and still doesn't work… So I tried to call Apple tech support and because my warranty is expired, they can't send me a new one.So… Is trying to go to a iphone repair centre my only solution?

Can't log in to iTunes store on iPhone?

Ok, so if I go onto iTunes on my iPhone its fine. But my problem is I want to update some of my apps, when I click on 'updates' on the app store I get a message that says 'can't log in to iTunes store'
Anyone know what I need to do?
Any help is gratefully appreciated.
Cheers

Added (1). Hunter: thank you for your answer, I have checked and my email address connected to my iTunes is correct on the settings, but still not working.

Scratches on iPhone 4S screen?

I bought a white iPhone 4S a few days before christmas. I have been using it everyday since. On boxing day I got a case and a protective screen cover. I placed them both on, but within a few days the screen cover had lots of scratches and just wasn't very good so I had to take it off. I then put the phone in my empty pocket whilst I was out; yet I was only at the cinema so It couldn't of got that damaged. I took it out and there was a huge scratch down the middle of my phone. Yes, it was only a hairline scratch but still, it was long and accompanied by a few other smaller scratches. Now, I feel as if the scratch has gotten deeper? It has affected the screen ever so slightly, as you can see when it is switched on a light fuzzy line down the middle. I sometimes take the back case off as it adds a lot of weight, yet have no scratches on the back at all. Do all iPhone 4S screens scratch so easily? And is there anything I can do about them?