Updating iOS version on iPhone itself?

Hi, I was wondering if I updated my iPhone to the latest version, on the iPhone itself; i.e, not going through iTunes, but rather by settings>update, will I lose my photos, contacts! And will I lose my jailbreak!

Computer not recognising iPhone 4s?

So I tried to connect my iPhone 4s, just to sync some music, no different from the last time I did it (when it worked fine) and its not being recognised.
My usb cord is working fine, when I plug it in, the iPhone bleeps and charges, but there's no response from my laptop.
All my usb ports are working, I've tested them with other devices, all fine.
I've restarted my iPhone, erased all data and restored it, restarted my laptop, reinstalled iTunes, no luck.
I've checked the device manager, there's literally nothing related to apple anywhere under any category. I've tried taking screenshots on my iPhone to get it to recognise as a camera, but nothing works. I've tried everything I can think of.

Why doesn't my iPhone 3GS Push notifications work?

My fiancé got me a used 3GS (times are hard) and ever since I've gotten it my notifications will not work. The notification buttons are all on. Even when I turn them off and then back on they still won't work. My fiancé is a computer wiz and told me not to restore my iPhone what so ever. Everything is on and sound is great just the push notifications won't work.

IPhone Problem. Recovery Loop?

I'm having a problem with my iPhone 3GS and it's really pissing me off.
It's a "Recovery Loop"
I was going through my iPhone in the process of unlocking it using this method http://www.ihackintosh.com/2009/08/unlock-iphone-with-ultrasn0w/
And after all was said and done I was supposed to restart the phone. When i did it went into a Recovery Loop and now I can't fix it. I've tried like a dozen programs that say they fix the loop but nothing worked. Help?

Running…
iPhone 3GS jailbroken
4.2.1 firmware
Latest iTunes

How to turn a file in to m4r from m4a?

I'm trying to create a new sms ringtone for my iphone, i have followed all the steps but when it comes to renaming the file from m4a to m4r there actually isn't a space to do that, the name of the song is just that, no m4a at the end. I've tried just typing it in and it won't work.

Why aren't my headphones to my iPhone 4s not working?

I just got the iPhone 4s a couple of months ago. I haven't even touched my headphones until last night, & they're not working? I'm trying to listen to Pandora. I dunno what's going on. It seems if I screw in the headphones extra tight and keep hold it plays through the headphones for a second. Anyone else have this problem or know why this is happening?