I have a Samsung Galaxy Y and rooted it a few days ago. After that I set up a few apps and granted them access to root permissions (via the Superuser app). I allowed root to all apps that requested ...
I bought an HTC Evo off someone and they had it rooted, but for some reason 4G isn't working. I'm not sure if it's because they rooted the phone and it now has wifi tether (idk to much about rooting ...