I can't sign into my Apple ID account?

I was trying to download some apps but some didn't download so I tried again, it didn't work, it got stuck on waiting and then just went away, so I signed out of my Apple ID and tried to get back in but it didn't let me, I have tried to sign in through App Store, iTunes and settings. I'm on an iPhone 4s. When I try to login it says "can't connect to iTunes Store". I have reset all my settings but still doesn't work please help.

Follow this steps at Apple: http://support.apple.com/.../kb/TS1368

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i can not sign to my apple id on my mac

i can not sign to my apple id on my mac

can't sign in my apple id on my mac

i can't sign in to my apple id