My iphone 4s is connected to the internet but isn't working?

I'm connected to my phone internet then i connected to Wi-Fi and when i try to go on itunes or the app store it says it can't connect however i can get onto google and youtube and stuff like that. Can anyone help with wats up with my phone

Should I get ios 6 on iphone 3gs?

Did anyone make the leap and update their iphone 3gs to ios 6?

What's is like, does it affect perfprmance and should I update mine? I'm currently running on io5.1.1

Can Verizon wireless sim lock the iPhone 5 if bill is unpaid?

So the iPhone 5 will be sim unlocked. What if I can't pay the bill when it is due or it is passed due date? Will they be able to all of a sudden lock the sim slot to their carrier?

Added (1). First answerer did not answer my question: if I pay late, will they relock the sim card? Obviously they will disconnect my service.

How to return to old operating system on apple 4s?

I have just updated my os to the newer os 6 for iphone and now my youtube has disappeared. Does anyone know how i can install the standard youtube (one that comes with the phone) back on or even how to go back to old operating system. I have downloaded one from the app store but its not the same and has different features?