If I jailbreak my iPhone 4 will I lose everything?

I only got the phone a week ago but I have a lot of pictures I don't want to lose. It isn't synced to an iTunes (I don't have music on it) I don't want to sync it to an iTunes unless I have to.

I'm jw will It delete everything (pictures & apps ect) if I jailbreak it?

Can I use AT&T iPhone 5 on Straight Talk?

I purchased an AT&T iPhone 5 off a friend who wanted to switch back to Android. I do not believe the phone is unlocked, but it could be. How would I check to see if it is or isn't? If it is not do i need to unlock it, if so how do I do that? Does Straight Talk have nano sim cards for purchase? Or would I have to cut the sim down to make it work? What is the best way to go about it? Does anyone have experience with this situation? I have an iPhone already and I don't want to pay 600+ dollars just to buy Straight Talks version at Walmart just so I can pay $45 a month.

I've got an iPhone stuck in infinite respring?

I have an iPhone stuck in infinite respring. It was jailbroken at one time. Now the apple logo just appears when its plugged in, stays on for about 10 seconds and then goes black for 10 seconds. It does this repeatedly. How do I fix this issue?

Added (1). I've already attempted to just restore the iphone to factory settings, and it tells me it is unable to complete because of an error. I'm able to get the iphone into recovery mode, but thats it.

Is the iphone 4 s worth getting over the 4?

So I'm on tmobile. I'm getting an iphone in July. The iphone 4 is free on contract and iPhone 4S is 199.99. But the 4s is double the GB and has siri and is faster.
ALSO: if I upgrade from samsung galaxy ace to one of these, will the contract price be cheaper? Like 100.00 less?
I'm 13. And in the uk tmobile DO sell iPhones. So please do not say that.

IPod/iPhone won't connect to itunes. WHY

Neither my iPod or iPhone will connect to iTunes. They connect to the computer but are not showing up in my iTunes. How do I fix this? I've restarted everything several times. Previously they weren't connecting to anything but I uninstalled the apple device, is this the reason? Everything else works fine? No idea what to do and it's been driving me mad for ages!

Excel sheet is not displaying correctly?

So i had someone email me an excel sheet of all the people attending the wedding, so i can print the names and addresses on the envelopes. When i view the sheet from my iphone, it shows roughly 160 names but when i download it and open it on my laptop macbook pro, it shows 52 names. Does anyone know why this is and how to fix it?

How to hide iPhone/iPod Touch Apps?

I would like to hide some of my apps so when my friends want to look at my iPhone, they can't see the apps I don't want then to see. Is there a secret way to hide apps and without jail breaking? Is there a way to glitch an app so it is invisible yet you can still touch it and it'll open? I know of the NewsStand and the Folder ones, but they are too easy to access. Any ways to do this? Thanks!
(I'm not hiding anything bad, just apps that aren't "manly": P)