T-Mobile says to wait for the OTA update for the Samsung Vibrant as opposed to using Kies3
Although HTC was nice enough to help out those EVO 4G owners who jumped the gun on installing a leaked version of Android 2.2 on their handsets, not all manufacturers will show the same gesture of tolerance and support – which seems like the case with the Vibrant. As much as the update might look tempting right now, it's probably just better to bypass it and wait it out for the official one from T-Mobile.
Samsung Vibrant Specifications | Review
via Android Central