IPhone app for listening to music without Internet?

I was wondering if anyone knows of a good app that allows you to listen to music without using any Wi-Fi or cellular data. Right now I use pandora when listening to music but I'm on a shared plan and when I don't have Wi-Fi around I find that it uses up a lot of my data quickly. I don't want to use iTunes because it seems like it could get pricey. So does anyone known of an app that allows me to listen to music that I choose (or similar to Pandora) that requires only Internet to download and not to listen to? I don't mind if it's not free. I have an iPhone 5 by the way.

How to reactivate an iphone 3gs under verizon?

I used to have an iphone 3gs under at&t but then I deactivated it and got a Samsung galaxy s3 under Verizon. However, I now want to reactivate the iphone because I'm having problems with the s3.Is there a way to activate my deactivated at&t iphone as a new phone under Verizon?

Should i upgrade to the iphone 5? - 2

Currently i have the iphone 4S.
I'm going on a case spree but if i upgraded then the cases would no longer fit then a waste of money, what about the iphone 5s or iphone 6… Should i wait till then? Or should i just go on a case spree for my current iphone.

Can an Iphone 4 be used with verizon?

AT&T screwed us over big time. And I mean big time. I will never use them again. Can we take our phones to a different company like Verizon? Just get a different sim card I guess? The company not only sucks, but we can't hardly use our phones anywhere, there's no signal. My friends with Verizon don't have this problem

I entered my iphone serial number and received this?

I went to this page of apple.com: https://expresslane.apple.com/Issues.action and entered my serial no in the coverage status and received this message: Our records indicate that this product has been replaced. Please provide the serial number for your replacement product to find the support and warranty coverage information.
what does this message mean?

Where can I get a cheap iPhone 5? - 1

So I'm looking for a cheap iPhone 5 preferably around the Ireland/UK area.
I've been looking at contracts with meteor but the word "contract" sort of intimidates me if I be honest.
If I do get a contract is it worth it?
Or would I be better buying off of eBay/amazon?