I had a Samsung Vibrant from Tmobile that had 2.1 but my phone broke and they sent me a new one with the Froyo 2.2 already installed. The issue is my phone is really slow and the touch screen lags a lot and the battery life is horrible. I have done a factory reset and it did not fix any of the issues I was all ready having. I heard if I reinstall froyo 2.2 it might fix the issues but I have no Idea how to do it or go just back to 2.1. I have already downloaded the Samsung kies mini and every time I want to update nothing happens. If anyone could please help me out I would be great full.