I found a way to force the OTA Update for Jelly Bean. Its actually quite simple, and it worked for me pretty quickly.
Step 1. Go into the settings menu on your phone and open the Application Manager. Now select the tab to see ALL of the applications
2. Look for "Google Services Framework" and click on it.
3. Press the Clear Data button, then click Force Stop, this will not hurt your phone or anything on it so dont worry! (If any of you are wondering about the Google Service Framework data clear, this is done because the Android update is sent out by Google, so when clearing the data and doing the force stop, it basically refreshes the current state and status of that service, which in turn makes your phone basically look for any updates.)
4. Now go back to the Setting Menu and go and to the System update area and go to Update Samsung Software. The date at the top where it says "Date last checked" should be something like 12/31/1969, which means your phone is now prioritized to recieve the OTA Jelly Bean update message.
5. Click the Check now button to check for the update again, your phone should recieve the update message. You might have to go back and repeat this process a few times, clearing the data and forcing stop, I was only pressing clear data first the first 2 times I tried this, and checked for the update and nothing happened, but then when I went back pressed the force stop button for Google Services Framework, and re-checked for the update I got the update right away.
http://www.ijailbreak.com/how-to/force-ota-system-update-android-phone/ <---- This is the website I found saying how to get the Update.
and this is the screen you should get after you press Install now after recieving the update
I was tired of waiting, saw this post, tried it and worked after the 4th try. It's downloading right now, it took almost 20 minutes.
This information should be sent to everyone.
Worked on 2nd attempt for me. Just bought the phone Tuesday as an upgrade from the EVO. Was going to wait until Black Friday, but have a 30 Day price guarantee that they (not Sprint, local retailer) said they would match if the price dropped. Love the phone so far and battery life is much better than I was getting with my EVO.
I wish I'd done this at home. I knew they'd push the stupid update to me while I was away from WiFi - and, it just started on it's own. YAY ME! (not)
So, here I sit, at work, with no mobile device.
On the bright side, I get JB