After a decade of modem rental, I'm buying my own. Comcast lists acceptable units for their different speed plans (Blast, ultra, economy) and suggests checking your monthly bill to identify the speed plan (http://mydeviceinfo.comcast.net/images/sample-bill.png). My bill simply lists "High-Speed Internet" for $53.95 per month. How do I determine:
(a) what plan corresponds to "High-Speed Internet", or
(b) what modem is appropriate to "High-Speed Internet".
Thanks much!