I have cable internet, but the speed or type of internet isn't really the issue. I have an 8320 that uses UMA just fine with no issues whatsoever. I have a Linksys WRT54G router running DD-WRT that works just fine. The 8220 connects to the router, but would occasionally drop back to EDGE for no reason and then reconnect. Also, when on UMA, the wife had a couple of dropped calls. She does NOT like that! So, I turned her UMA off and the issues went away. That is why I am presuming that the UMA just isn't working well with this build.