Performing a Hard Reset on the Samsung Focus
If you are using a Samsung Focus and experience the 80180048 error, you can force your Windows Phone into a hard reset, thereby restoring the factory settings.
This is done by dialing ##634# on the phone pad press, then tapping the Call button. You will then be presented with the diagnostic screen – various codes can be entered here, and the following code is used to perform a full restore: *2767*3855#
(Other methods of resetting your phone are available. You might use Settings > About > Reset your phone, or hold the following buttons together: Power, Volume Down, Camera.)
You should be aware that a hard reset will delete all personal information on your phone, such as accounts, web pages, apps, etc. Once you have reset your phone, connect via USB to your PC and Zune should successfully update it.