What's wrong with my new iPhone 6?

I got a new iPhone 6 on June 25. It started charging really weird. If use it while it's charging it dies slowly instead of charging. What's wrong with it? Can I fix it?

Photos use too much space on my iphone?

I have iphone 5s 16gb and it can only hold 200 photos, which use about 4gb. My friend has 16gb iphone 6, 2000 photos and they only use 6gb. Is there problem with my phone?

Added (1). Can i change resolution of my photos?

My front iPhone 5 (iOS 8.4) camera doesn't work?

I open the app and when I try to use the front camera it's very blurry (can't see anything at all) and it freezes. I tried getting a new camera installed and that didn't help at all. The back camera works perfectly fine.

IPhone Whatsapp number transfer?

Backed up everything to iCloud.
Getting new phone, however, whatsapp was attached to my US number and i'm putting in a UK sim. Would it automatically keep my USA number?

My iMessage never delivered?

So my boyfriend didn't pay his phone bill this month so he no longer can make calls or do anything on his phone unless he has Wi-Fi. He has an iPhone 4. I text him off of an iPod touch though because I don't have an iPhone. We both text off of iMessage, but since I only have an iPod and he didn't pay his phone bill, we both need Wi-Fi in order to talk. I sent him a text through iMessage today and it never said "delivered". I know he's at work right now, and not sure if there's Wi-Fi at his work. Is that a possible reason of why it hasn't delivered?

IPhone 6 screen malfuctioning?

IPhone 6 screen malfuctioning? - 1

Added (1). about a week ago my iPhone 6 started acting funny. My screen would begin to become discolored and then the picture gets fuzzy until the screen goes black. I press the sleep button on the side and then the home button and after a few tries the screen will go back to normal but only for a few minutes before doing it again. While it happens all my apps continue to run perfectly fine the screen just seems to be messed up. Any suggestions before I take it in to be serviced?

What app is good for hotspot?

I got an iPhone and like on the android market usually had good apps for free. I need an app that would like make my phone data be able to turn to a Wi-Fi hotspot. Is there one for free that works well.