How to Backup Your iPhone?
Backing up your iPhone is always a solid idea for protecting your media, applications and other content in the event your phone stops functioning. Thankfully, it is very simple to do.
How can you retrieve SMS backup with your iPhone 4?
They are very good phones but xperia arc is better than iphone 4 for a little!! --------Arc is better but iPhone 4 is still the best when it comes to OS & Display. Check the sources below
How do you backup your iPhone to a new computer without loosing everything?
If you plug it in it will start to sync. You can always sync it back to the old computer and still have the things from the new computer. Hope this Helped! Trust Point please!
How do you view your iPhone backup in your PC?
Yes, depending on your state sales tax.
If you back up your iphone, put in in regular mode (restore), jailbreak it and then restore your backup...?
I did when I did that with my iPod...which is kinda like an iPhone. So I would say yes