How to remove jailbreak from iPhone 4 without restoration?

I want to know if it's possible. If it isn't, please let me know how to go about then.

**ALSO, will restoring my phone force me to upgrade to OS 6, or will it remain at os 5.1.1 (which is what I want!)

Thanks in advance

Added (1). How can I download 5.1.1?

Why won't my iPhone connect to the charger?

I have an iPhone 4 and it has suddenly not been connecting to it USB charger? I have tried it with three different ones and all of them work for a second and you have to move it about just to get it to connect for a second! Why is this happening? What can I do to fix it?

Internet Connection not working on iPhone?

Recently I got the iPhone 5, I put my internet connection on it but I accidently put the wrong pass-code and now it just keeps loading and loading and doesn't stop, I tried my cousins connection and it works fine but every time I click on mine it keeps loading and doesn't stop.

Why won't facebook contacts sync to iphone 5?

I want to sync my facebook contacts to my new iphone 5 and when I go to the friends screen and hit the button in the top right corner it only says find friends or cancel, and when I restart the app it asks me if I want to sync contacts and I clicked yes and nothing happens.

What do I ask for for Christmas?

I'm 15 and a girl, just not very girly. I'm more athletic than anything. I like pretty much any sport and music. I kinda love One Direction and Ed Sheeran. I already have an iPhone, Laptop, Uggs, Wii, and One Direction tickets. And I don't want to hear any comments about being a spoiled brat. Any suggestions would be much appreciated, thanks in advance!

IPhone 4 stuck in headphone mode

So, my iPhone 4 is stuck in headset mode because I spilled milk inside of the hole it goes into, I can hear the alarm and when I get text messages file but when someone calls I can hardly hear it, when I play music nothing comes out and the volume bar that used to be there.