Iphone 4 cases, which do you recommend?

I have had 2 Iphones before this, one died at a music festival due to a giant rain storm and the other died because I accidentally dropped it down some concrete stairs.

My mom upgraded to a 5 so I'm getting her 4 tomorrow and I really do not want to screw this up. I'm definitely getting a screen protector.

What Iphone 4 case brands do you recommend that are under 30 dollars? Really safe and all?

How to get iOS 7 on my iPhone?

My friend has iOS 7 on her iPhone but won't tell me how she got it. Is there any way to get it or do I have to wait until it appears as a software update in general settings?

Retrieve deleted notes from iphone?

Okay, I'm really desperate to get this note that was suddenly deleted from my iphone 4.It was there the other day, but when i checked it today, it was already deleted. The note is really important to me and the fact that i don't know how it got deleted, frustrates me more.

Is it possible to get it again?

How to transfer contacts from old iphone to new iphone?

My old iphone crashed the other day so I lost all my contacts, my photos, my videos, important passwords etc. Apple gave me a new iphone 5 and now I've been searching for a method to reset the stuff from my old phone on to my new one

Anybody know how this can be done?