I Have an IPhone 4s I Just Downloaded The New Iso7?

I Have an IPhone 4s I Just Upgraded my Phone to the Iso7 & it keeps tellin me sign in required when i try downloading an app I click on sign in required & It automaticly goes to my Account setting & It showing me my credit card info but it still won't let me download apps on my phone even tho my card doesn't work i can't download anything because of my credit card issuse If Anybody knows how i can get my phone workin again i would be very happy

If you have no balance owing then change your payment info to none then save. If you owe balance then you will have to put a gift card on the account to clear the balance. Itunes will ask for payment verification. If you do not verify you can't use itunes. This is an itunes issue nothing wrong with the phone.