Unable to update apps on iPhone?

I have the iPhone 4s, just recently downloaded iOS6 but I've been having this issue since before I updated. I have updates on my apps and I want to download a couple others, but it says I have to confirm my billing information. It keeps saying my security code in invalid but it's not. I've tried re-entering all the information but it keeps saying it's invalid. I had this problem once before and it was because my card was overcharged, but I recently put money on it just to be safe and it still isn't working. What can I do?

Go to apple.com and try to see if anything changed on your account. You should be able to fix anything there

  • Unable to update iphone 3gs software? I just got an iphone 3gs and i'm trying to JB it so i can use it on tmobile but the software is on 3.1.2, when i try to update it to anything new it says "iPhone2.1_4.3_8F190_Restore.ipsw" was not copied to the iPhone (insert name) because it can't be played on this iphone." says this with later updates as well. Any help?
  • Unable to update apps directly from iPhone? When I try to update an existing app or buy a new app on my iPhone 4, the password box comes up, I type in the correct password, a few seconds later, the same password box comes up and I type in the correct password again, a few seconds later, my original purchase/update request seems to be cancelled. I have tried signing out and in inside "Settings" I have just upgraded my iOS to the latest version, but still no luck. What do you advise please?
  • Unable to get free apps on my iPhone So I have my debit card set up to my App Store so I can buy apps and music off iTunes. I have $7 in my bank and it won't even let me get a free app is says it was declined which means there isn't enough in my bank but its a free app and I have money in my account. Is there any way to fix this problem?
  • Unable to connect my iphone 4 to my home Wi-Fi? I just recently got given someone's old iphone 4, before i reset it i synched it up with my Wi-Fi jut fine, however when i put it back to the factory settings and tried to connect to my Wi-Fi it doesn't work, instead the wheel thing just keeps spinning round and has done for about an hour. It says i'm connected to the Wi-Fi yet it says 3G at the top, i've tried forgetting the network and reconnecting but it just doesn't seem to work.