I currently have a Suddenlink Coax Cable Modem connected to a new AirPort Extreme. I have been using Suddenlink for 20 years. Next week AT&T is coming out to install their Digital Service to my home for Telephone and their Plan includes Internet service and a Modem they provide. It would save me about $65/month, if I could discontinue my Suddenlink Internet service, but I don't trust the AT&T Internet service yet. Is there a way I could keep BOTH the Suddenlink modem and the new AT&T modem connected and switch between the two until I gain confidence, then maybe terminate my Suddenlink subscription? With Suddenlink I am getting 50 Mbps download and 5 Mbps upload (verified). AT&T "claims" 50 Mpbs download and 10 Mbps upload - is that even possible through a phone jack? AT&T says that with their service I have a "direct" connection to AT&T which gives me more reliable and consistent data speed whereas with Suddenlink I am on a shared neighborhood connection that varies with load - does that sound right?