Internet Not working on apps?

I have an iPhone 3gs and recently a number of apps are unable to use the internet. For example: YoutTube, facebook, App & iTunes store etc.
However I can still connect to the internet using safari, I know it's a problem on my phone because these apps are working on other devices.

Does anyone know how to fix this?

UPGRADE

  • Wireless Internet not working? I have a lop top I live in a apartment that offers free Internet. I teared on my computer to go on the Internet it ant working at all. I called the Internet places they said its working fine. It shows on corner of screen that something's unplugged witch is not since don't have a house phone. Pulse looked around looks like a rectangle peace is missing from side of computer. What is the problem how do I get Internet up and running again. I using my iPhone to write this.
  • Why does my iPhone still charge for Internet even when I'm not using Internet? So, I recently got a pay monthly plan with my new iPhone 4s. When i'm out and about I'm usually updating my twitter and Facebook account. But, when I'm put my phone down, 3G still says I'm using it and charging me. So do I have to turn it off when i'm finished? Or is there a much easier way?
  • Switching from 3G to 4G, Internet not working.iPhone 4S? I had an iPhone 3G with Rogers pay-as-you-go plan then I recently upgraded to a 4S. My data plan seems to work fine with making calls and texting, but the Internet won't work at all, just says it can't connect? Do I maybe need some sort of 4G plan?
  • My Iphone is not letting me access the internet or internet based apps? I have an Iphone 5. Never had any issues but now it won't connect to the internet or any apps. It does the same thing it does when I have no service (just has that little circle symbol that means it's trying to get through). Orginally, I thought it must be a universal problem but everyone else has service and they are in the same location as me. Also I always use my phone here with no problems. I have tried turning it off and on again but nothing.