I have a Sprint Hero that came with 1.5. It was ok, at best. I updated to 2.1. I hate it now. Two biggest complaints - very slow, slagging and my 'proximity sensor' market software doesn't work. I think I might want to root. How would I know which ROM to select? What if I don't like it? Can I go back to how it is/was? How difficult for all this? Thanks.