My new iPhone 6 heats up when I use it?

I got an iPhone 6 last week and I felt that the back of the phone gets hot when I use the phone. I thought it was a faulty one so I exchanged it for a new one, and the same problem happens: It heats up! Especially when I use Mobile data (3G/4G).
I have turned of location, Bluetooth etc but it still gets hot, even with a little usage

Reset all settings on iPhone 6?

I've been having recent battery issues on my iPhone 6. It just tends to die quicker than it used too. I was talking to an Apple person and they mentioned Resetting all settings. Is this a good idea for the problem I'm having? She said it won't affect any of my data or pictures or anything like that. I know that my Wi-Fi settings will change and ringtones and stuff like that. Is there anything else that will change?

How to cancel my Spotify Premieum free trial?

Please Help! I signed up for a 6 month FREE trial when I got my iphone 6 because sprint offered it to me, but I got this text. Click on the picture to read it. Are they going to charge me? How do I cancel before they do? Please help, thank you How to cancel my Spotify Premieum free trial

How to recover text messages on iphone? READ DESCRIPTION?

So I need to recover my text messages. Basically someone is doing bad stuff to me so I need evidence and I had all the text messages on my phone. The problem is my phone fell in the toilet, I know i'm dumb, and I'm getting a new one and I really need to recover my texts. I had icloud and have my pictures backed up but i don't know if i had my texts backed up, i don't even know if you can back them up. Is there any way I can recover my texts before my phone comes in.

Why can't i receive texts from group texts that are created by iphone users?

Why can't i receive texts from group texts that are created by iphone users?

Added (1). i downloaded apps like TextNow & Pinger that let you text and call for free (gives you a number and lets you text others even if they don't have the app). If i text them individually it works, it even works if I make the group. But then if someone else decides to make a group text and add me in it, i wouldn't get any text from any of them. Do you know any apps that let you text and call for free AND lets you receive texts if someone else who has created the group chat?

Is there a way you can submit photos you took yourself to Apple?

I took a amazing photo on my iPhone 6 in San Fransico of the golden gate bridge and everyone tells me it looks professional grade. I was wonder if I can submit this photo to apple for them to use in like those "took on a iPhone commercials" or maybe even a default wallpaper for the new MacBook Air! Jk about the wallpaper but I'm serious about sending it to them so they can maybe use it in one of those commercials. Is this possible?

Are flipped photos accurate?

When you take a photo on the camera app (on a iPhone) the pictures flips then saves, but on let s say the snapchat camera nothing flips it stays the same. What's more accurate? On the flipped, I look horrible like my face is all pointed to point at the other side. (If that makes sense) I showed many of my family and friends a picture of me flipped or the snapchat photo and they all say I look like the snapchat photos. (And I hope that s how they see me) I believe them, but all this research about mirrors being what we want to see and cameras are confusing me. Can Someone explain?

I can't update my iPhone 6 to iOS 8.4.1?

I can't download this update it keeps saying that it is unable to install after it verifies it. But now IIm iffy about downloading it because I hear there have been a lot of major problems with this update. I want to try it though. So any ideas about why it won't update