Microsoft continues to investigate the issues some Samsung Windows Phone 7 users are experiencing but WinRumors has an unofficial fix that will get you up and running until Microsoft can address the problems fully.
Numerous WinRumors readers have written in to confirm that their Samsung Omnia 7 Windows Phone devices are now working correctly after reflashing the default stock Samsung ROM. The fix should only be applied if you have had troubles with the update and your device has been left in an unusable state not fixable by other means. Microsoft’s official stance is to return these “bricked” devices to carriers or stores but if that’s not an option for you then you can try this fix with CAUTION. Be warned the process is risky and could void your warranty. The fix is ONLY for Samsung Omnia 7 devices so please don’t blame us if this nukes your device fully, steals all your cookies or kills your pet hamster:
Check if the phone is capable of getting into the ‘download mode’. To do this: Turn off the phone (or remove > replace battery), then turn it back on by pressing the power/camera/VolumeUP buttons simultaneously. When the phone turns on, release the power button. If the phone shows the yellow triangle with exclamation and a “download mode” message, your phone is capable of getting into the ‘download mode’, and you can proceed to step 2.
Download the following files (be warned: multiupload.com is loaded with huge ad’s/pop-ups)