I went to download the free case app, but a message popped up saying I needed to verify my payment info before I could make purchases. This was strange because the app is free and I have made plenty of purchases before on my phone. Anyway, I entered the security code, but it says it is invalid. I am 100% sure it's the right code, so I have no clue what's going on. Has this happened to anyone else before? I called apple and they said it was a new feature put in place because of the fraudulent app purchases, and they said try my code tomorrow (I called yesterday) and it should work. But, no luck.