I downloaded an mp3 app from the app store on my iphone, i was downloading a few songs and suddenly the screen went blank, i still recieve emails and my alarm worked. i tried rebooting it and it still doesnt work. any ideas ?

So "Music Meow" is a Big Pain, I found a easy to use and FAST music downloader, its called.... Wait 4 it......."Free Music'' :) its fast and easy to use. you install it using Cydia, just search for it. Then, this is a requirement, you HAVE to go to Apple's App Store and Buy iDownloader for $1.99, the one from Installous does not work. Then all you do is search for the song/artist you want and in most cases it downloads really fast like 30 seconds, some are slower. then you can either listen to that music through the Free Music App OR email them to yourself and drag them into iTunes and sync the music back to your iPhone. You will want to email EVERY song you decide is a keeper to yourself and sync it back to the iPhone, because if you get to many music files built up in the ''Free Music'' App you will run into problems. Also you will want to use WiFi to do this, Cellular data speed is way to slow and it will cause issues.

So you will see that you wont know how good of quality the song is till its downloaded, then you can preview it in the App and if its not the song you wanted, swipe it and delete it and download the next song in the list. usually the first song in the list is the one you want, but sometimes the 2nd or 3rd is of better quality or version of that song you want.