Is my iPhone 5's behavior normal?

First, the home button isn't flush with the glass. It still works perfectly but i'm worried that it will cause problems down the road.

Second, there's white noise coming from all my recording on my phone. Voice memos and videos have this but as soon as you exit it, the white noise is gone.

Third, the power button is just a bit loose. If you shake the phone hard enough, you can here it rattle.

Should i be concerned about these problems? This is my 4th replacement so i'm tired of backing up and restoring.

Thanks everyone!

Added (1). For the first one, i mean the home button is raised above the rest of the glass.

Can I fit a bumper OVER a case?

I want to purchase a plain clear case for my iPhone 4S, I also would like to buy several colored bumpers to change out as I please.

Do "bumper cases" fit over a normal plastic case?
And if not/if so does anybody have any recommendations?

How to stop songs from skipping on iphone 5?

I have an iphone 5 and when i listen to music, it would skip a lot of songs and when i look at my song list it would say i have the song but when i tap on the song it would go directly to the next song on my ipod i have the same songs but it doesn't skip.

What is wrong with my urbeats by dr.dre and how do I fix it?

For the past two days, my Urbeats by Dr. Dre have been acting up and now they aren't working properly. Whenever I have them plugged into my iPhone it makes my phone start glitching (like Siri keeps popping up, music randomly plays and pauses, etc). Then yesterday the right earbud just stopped working completely and I can't get it to work. Just so know, I have been taking good care of them ever since I got them a couple months ago, and I just want to know how to fix this problem.