I would like to know if the Motorola 6120 DOCSIS 3.0 Cable Modem will work on download speeds of up to approximately 100 Mbps?
If not, what speeds are supported?
Thank you for your help.
That modem is no longer supported by them for any speed period. Look at their supported modems list here;
I viewed the list of modems, however it stated not all modems may be listed on it.
The modem worked a couple months ago, but now it's considered EOL?
Yep. It may still be grandfathered in for you, but they won't activate it anymore for new / first time users.