My local DOCSIS3 is oversubscribed and the current target fix date is 20th Jan. Given the frequent slippage on these upgrades I decided there's little point paying for 50Mbps when a lot of the time I get less than 10Mbps so I called to downgrade.
One bit of info I found useful and was new to me is that there is no minimum term on upgrades/downgrades so no penalty for downgrading inside a minimum term (I upgraded to 50 from 20 last January). In the unlikely event of me going back to anything over 10Mbps I expect I'd still be stung for the magical £30 directors beer money but there's not much chance of that happening - having been stung once with failure to deliver I'll probably give Infinity a whirl when it comes.
Anyhow the only change was the config. Still bonding 4 downstream and the modem didn't even reboot. I manually rebooted to see if it would move off the currently overloaded DOCSIS3 channels - it didn't. That's disappointing - I was hoping to get away from the congestion
