I upgraded to 20Mpbs on 12/8/09 and was billed an additional $25 but never received 20Mbps speeds. After 18 calls to technical support, several hours of troubleshooting, a new router, and confirmation from LinkSys that the modem was capable of 42.88Mbps speeds, Charter refused to credit me the month of service - or lacktherof. Instead Dean, from Billing, transferred me to a number that kept ringing and I could not leave a voicemail - their idea of customer service. I filed a complaint with the FCC. read full review »