When I download free apps it works just fine. But when I get paid apps, i get an e-mail thanking me for the purchase, but when I try to download, all i get is "authorizing purchase", it never downloads. I bought Shazam but it never downloaded, it's been a week now, and I went to places where I got 4G, I tried the Wi-fi, but nothing worked. I thought it was Shazam, so I bought a different, app like Shazam called SoundHound, but it still does the same problem. Is this a problem with my phone? should I go back to sprint and ask them about it? what's the best solution for this?