Unknown Error 28 iPhone 3G

This happened to me as well.
I updated my iPhone 3G to software 3.0 and later that evening it turned itself off and tried to restart. It kept freezing however at the apple sign. I tried everything i could think off! My last resort was to force it into recovery mode and try restoring it on iTunes (8.2). But after the software is extracted a message box appears saying The iPhone iPhone could not be restored. An unknown error occurred (28).
Any help or advice?!
Nik
MacBook Pro (Oct 08) Mac OS X (10.5.7) iPhone 3G, iPod Shuffle (2 gen)

I had mega problems too. Try following the steps in my posting as below after creating a new user account on your computer with ADMIN priviledges also. See my posting on 20/06/2009 22:33 titled Upgrade Error number 4 and Restore Error 1603 when going to OS 3.0 - Solved And turn off any antivirus and firewall software too, before doing so. In ITunes, highlight your iphone icon and then click the Restore Button on the ITunes Summary tab which seems to force the iphone into an update. Dont try using the Check for update button. Good Luck...........
If i was doing my upgrade again i would first do a backup in ITunes, and then On the phone go to Setting > General > Reset > Erase All Content and Settings. And then restore the backup after the OS 3.0 upgrade
Toshiba Satellite Windows Vista

I also have the same problem. I upgraded to OS 3.0. The other day my phone just froze up and now its stuck in recovery mode. Ive tried pretty much everything i can. Set up a new user, uninstalled every apple application on my pc, re-installed itunes etc, still no joy. Whenever i go to restore i get the same message, an unknown error occurred (28), during the phase preparing iphone for restore. Ive tried the various other tricks like setting the phone into DFU and trying on a different computer but nothing seems to work. Has anyone had any joy in solving this problem? Im booked in at the Genius Bar on Saturday so ill post a solution if they fix it.
iPhone iPhone OS 3.0

I have a similar problem....Iphone is stuck with Apple Logo and a circular wheel across it / cant do anything with it and iTunes wont see the iphone at all.....ideas ?
Iphone3G iPhone OS 3.0

My iPhone 3G was wiped out during the upgrade to 3.0. Apple has three subdomains that should be allowed through the firewall but because I was impatient I just put my computer in a DMZ for a long enough to complete the update. A DMZ for those who dont know just puts your computer outside the routers firewall. Just make sure your bring it back behind the firewall when youre done if you go this route. My router is a 2Wire which I dont find very easy to manage the firewall in. Hope that helps someone.
EDIT I did make a backup before had, which I forgot to mention in the original post. When I had the phone in the DMZ it successfully updated to 3.0 and restored my previous data on top of that, so I did not lose any information. In case I set any hearts to worrying.
Message was edited by: michirojo
iPhone 3G iPhone OS 3.0