Does iPhone 4s back up Notes, Contacts, Pictures, Games?

I have iOS 5.1.1 and i'm planing to upgrade to 6.0.1.
When you back up your iPhone 4s and upgrade it, you can restore it? And the notes, contacts and pictures, games can be restore?
Sorry for my bad english.

Added (1). Oh, I forgot to say,
Does iPhone 4s back-up Notes, Contacts, Pictures, Games in iTunes?

Yes.

Yes.

Yes, it does by iTunes but i don't know the procedure. But it does.
Answer mine please?

  • Why does my iPhone notes app.delete some notes? Some have been there for over a year others just disappear after a few days. I have not (to my knowledge) done anything differently.
  • Some of my notes on my iphone disappeared, how do I get them back? I deleted my Mail account, forgetting that notes were attached to it because I wanted to have a different mail account on my phone, and when i realized i added it back, and all of my notes were still there, but they were all duplicated since i had both accounts on I guess? So i was deleting some of the duplicates and then (i don't know how or why) all my notes for the last 6 months got deleted. Is there any way to get them back?
  • My iPhone says that my Notes is taking up 1.79 GB of storage. I only have 3 notes, and there isn't a lot of text in them. How do I fix this? Recently there were a lot of notes on my phone, but I deleted most of them until there were only three notes left. However, my phone still says my Notes takes up 1.79 GB. I tried writing a really lengthy note to see if the GB would go higher, but it didn't change. I don't want to delete my three remaining notes, which have very little text in them. I doubt that these notes are taking up 1.79 GB. What is the problem here, and how do I fix it?
  • My iPhone deleted all my notes. Can I get them back? I added a new email, after having a problem with the same one and I deleted it. After I added it back, all my notes were gone. I thought it was a glitch so I turned off my phone and then back on again and it was still gone. Can I get them back? I had a lot of important writing in those documents.