IPhone 3G is stuck syncing

Question

I apologize for how long my question is, I simply want to thoroughly explain my issue and all of the ways I have attempted to remedy it. Thanks!!
I recently tried to sync my iPhone 3G, which mind you, is just days over one year old so is no longer covered under warranty, in iTunes.
I had not synced in a week or two and had previously had no problems. I plugged it in and iTunes said "verifying Emily's iPhone" where it would normally say "Syncing..." or "Backing up iPhone"
This didnt worry me until it continued for a few hours without changing. When i tried to click anywhere, iTunes quickly became unresponsive.
I unplugged my iPhone, restarted it, reset it, cleared all the settings, restarted my computer, reinstalled iTunes, and perhaps most dramatically, deleted my entire user account on my computer and made a new one with its own brand new, never before touched, iTunes. This means my new iTunes now holds none of my music, photos, videos, anything(however, they are all safely stored on my computer in a folder.) Nevertheless, this is like having an entire new computer. I even did a scan for viruses to make sure nothing evil was this way coming.
Throughout the entire excruciating ordeal, I continually attempted to sync my iPhone to no avail. The only change was that instead of iTunes telling me it was verifying my phone, it said that it was syncing it. I even left my phone for 10 hours with absolutely no change in the situation. The computer still simply said syncing.
When I made the new user my iPhone did succesfully sync, or so I thought. It said that my iPhone was done syncing, however no actual content on the phone had changed. None of the music or photos or videos were gone. The only thing missing was, frustratingly enough, my ringtones. I realized that nothing was selected to sync; I attempted to make them sync and my process began again. Syncing simply would not happen.
All of this leads me to believe that there is no issue with my computer. Something has to be wrong with my iPhone. Does anyone have experience with this issue? Just knowing that someone else may be having the same problem may be enough to prevent me from turning my fantasy of throwing my iPhone as hard as I physically can into a concrete wall and watching all the little pieces of Apple's precius evil baby fly everywhere, into a reality.

Answer 1

Try putting it in DFU mode:
Open iTunes on computer.
Connect iPhone to computer. (with the iPhone on)
Hold both home and power buttons for exactly 10 seconds, release power button, keep holding home button until iPhone recognizes iPhone in Recovery Mode.
Usually takes 10-20 seconds of holding the home button.
If the iPhone screen is black (blank) the iPhone is in DFU Mode.
If not try again.