ITunes Song Won't Play On IPhone 4S?

Clarity by Zedd shows up with no artwork and won't play when i hit the play button. I need to re download this song on my phone like delete it and then download it.
How do I do this? Advice?

Would someone from US buy me an iPhone 5?

The price here for an iPhone 5 (in Malaysia) is incredibly expensive. I need little help from people in US to buy me one and ship it. I would pay back of course.

How to right click on iPhone?

Over the weekend my wife and I switched to iPhone as previous windows pc users, I got the black iPhone 5, and she got the white iPhone 4 special edition. I've been having the same issue on both phones so I'm not sure if both are hardware defects or the software is oversimplified/dumbed down for unsavy tech users and in my opinion so far relatively unusable. Wife doesn't care so much but I do.

Restore iPhone 4s without updating firmware?

I'm currently using iPhone 4s running IOS 5.1.1 as I can't upgrade due to using a gevey ultra s to use my phone on o2 as its locked to orange.

Now when I try use custom firmware I get all sorts of errors, I just want to restore without updating,

If that fails any free IMEI unlocks? For orange UK

Upgrading to iPhone 4 from 3GS?

I'm upgrading from 3GS to 4, what are the definite differences between the two?
Plus is the iPhone 4 speakers louder and are the graphics better?
Also the speed?
Please note all other changes you know of

What could be causing my sore heads and dizziness?

I'm 17 years old and I basically spend everyday on my iPad, laptop, iPhone or watching tv. I don't exercise and I don't have a good diet. Every time I stand up I get dizzy and have a head ache. And if I run up the stairs or run a little distance I feel faint. My mum is trying to make me get a blood test but I'd rather have an idea of what's wrong first. Could it be from spending too much time looking at screens or lack of exercise?