Hello,
This thread is for those who are currently using Comcast.
If you're experiencing any problems please take the time to read the provided threads.
If you're not, I still suggest doing it for possible problems in the future.
Official Thread:
http://na.leagueoflegends.com/board/....php?t=3521364
Interesting Thread:
http://na.leagueoflegends.com/board/....php?t=3688185