Free Music app for iPhone 4?

I've been dying to get music but I don't have the money to go and buy everything I want. I'm trying to find a, say it with me now, FREE app. What I mean is no "free trials" that last only a week or something and then you have to pay. No. It also needs to be legit music so NO SOUNDCLOUD OR YOUTUBE. Also has to be able to play in the background. I tried skull mp3 but it work every time I hit download it took me to another window and played that song. I'd also like it if it was something like spotify or beats music but without the free trial. Also Nothing with the "radio" thing please!
Just remember FREE NO SOUNDCLOUD OR YOUTUBE AND WORKS LIKE SPOTIFY AND NO RADIO
Sorry for the requirements.

IPhone 4S keeps going into Do Not Disturb mode without me turning it on?

I will check my phone to see if I have any alerts and notice the moon in the top right corner indicating that Do Not Disturb mode is on (I will be calling it DNDM from now on). I don't remember turning it on, but the first few times it happened I just brushed it off as a possibility that I accidentally did. But it happens like once or twice a day now. I'm not even sure if the DNDM works when it mysteriously goes on because I will still receive texts, even if its unlocked (although I turned it to the setting to still block texts and calls while its unlocked). My iPhone 4S is like 2.5 years old so it may possibly be a technology thing, but I have all the current updates (7.1.2).

Anyone else have this problem or know how to fix it?
What could be causing it to put itself into DNDM?
Why wouldn't the DNDM work if it says its on, regardless whether I turned it on or not?

Its really not that big of a deal so I'm not going to take it into the Apple Story or anything, I was just wondering if this was a common problem. I can deal with it until the iPhone 6 comes out, thats for sure.

My iphone won't turn off

Okay so I keep trying to turn it off I have an iPhone 4s I keep trying to hold the power botton and it doesn't do anything and then I went on the internet and it says to hold the home bottom and the power botton but when I do Siri is all it comes up please help me

How to reset iPhone 3 without a computer?

Recently I got an old iPhone 3 and I was gonna use it as my phone and use my current iPhone 4 as an iPod (the iPhone 3 has more room). I put a password on it and I can't remember what it was. It doesn't have iOS 7. Is there a way I can reset it without a computer?

VPN on iPhone 5s won't mask my location?

When I connect to my VPN over my home Wi-Fi network on my iPhone 5s, it still shows my actual location on Maps. How can I get around this and have my location be masked to the new IP address elsewhere?