Why can't I view apple Id on iPhone 4?

I'am trying to view my apple Id on iPhone cause I'm unable to download any apps on my iPhone and I think it may have something to do with the iTunes Store country setting. I have tried logging in but it loads and then flashes back to the iTunes&apps options. I don't think there's anything wrong with my iTunes account because I use the same for my iPad and its works.

I think you should look in the manual that came with your phone or go to your wireless service provider.