So what is uncapping cable modems? Uncapping cable modems refers to activities performed to alter a DOCSIS cable modems settings. Plain and simple someone is messing with the cable modem's configuration file to get what they want.  So what do they want?  Greater bandwidth (the need for speed), wanting more than one public IP, or any other configurable options a DOCSIS modem can offer.  Maybe they just want to prove they can do it and or feel they are getting the shaft from their cable provider.  Really the psychology of people is