Increased internet speeds for existing accounts was announced to me in a Cox, July 3 email, and broke communications between modem and router.

Increased internet speeds for existing accounts was announced to me in a Cox, July 3 email. After following the modem reset directions to the letter, my modem would no longer connect to my Arris SB6183 router, nor would a desktop directly connected to the modem. Following a 1:18 minute telephone call, a consistent positive result could not be established. The interim success proved the new 150 Mpbs speed, but then failed never to return. A follow up call to another rep and a central reset resulted in the modem being returned to its original 100 Mbps state (not 150 as promoted). I seem to have all connectivity with devices returned as well. I confirmed with Cox and the Router manufacture that the SB6183 should effectively handle the 150 speed. Question: Any similar problems, any better results with upgrade?