My iPhone keeps tapping other things when I tap something different?

I have an iPhone 5C and every time I tap something it doesn't click what I want. It usually just hits the whole different side I tapped on. It gets really annoying I have to lock my phone and unlock it a couple of times before it goes back to normal and it only lasts for a few minutes. I also have these grey marks on the top and bottom of my screen and I'm not sure what they are and I don't know if that's what's causing this to happen.

I accidentally gave out my address to a scammer?

All right, so I was looking through the comments on a video and found that the uploader had posted a comment that said " Got 1000 iPhone 6 For My Subs. Its WorldWide And Shipping Via DHL!

My New Partner Verizon Corp Are Giving 1000 iPhone 6 Only For My Subs

Hurry Up! Like I Said Only First 1000 Will Get iPhone 6! Click iPhone6.CardsForSubs.com".

I filled out all my details and submitted the form. Only after that, I decided to click on the user that made the comment. I realized it was a fake account with the same username as the uploader.

Am I in trouble?

My iPhone 4S won't can't access the internet on Metro PCS

I have an iPhone 4S 8gb, and it is unlocked, its original carrier i think is att or tmobile but i placed in my metro pcs sim, i'm able to call and text but i can't access the internet. It says 4g next to my signal bar. And it also says tmobile instead of metro pcs. Like wtf, help. I think it is the apn setting. I tried fast.t-mobile.com and fast.metropcs.com. Wat can i do besides contacting metro piece of ****.

Replaced Iphone screen now it won't turn on?

Earlier I dropped my phone and it broke so I replaced it myself (I probably shouldn't have) and it won't turn on. Well the only thing it shows is that its charging but it's been like 2 hours and it won't turn on

My iPhone randomly shuts off?

I have an iPhone 6 and lately it has been resetting on its own. I will just be texting someone or on Instagram or something like that and it will just go to the white screen with the apple sign on it as if my phone is turning on. It stays like that for about ten seconds and then goes to the lock screen. Why is this happening and is it a problem? My iPad mini also does this.

Should I buy the iPhone 6 or 6 Plus?

I'm buying it for my birthday but I'm not sure. Don't try to convince me not to get either because my mind is made Kay? I know the size is very different but I'll be able to use both sizes so that doesn't really matter. I can completely afford both of them by the way. So what should I get? I'm a girl if that helps so phones are kind of important XD