upgrade from charter 's modem , motorolum sb5101 to this modem . charter 30mb download 3mb upload internet package . i be get 20-22mb speed . i replace the 5101 with this modem and test several speed test site , speakeasy and charter own speed test . in the middle of the day on president day when a lot of people be home from work and probably on the internet more then a usual Monday . i be get 52-60mb download and 4-4 .5 mb upload . awsome speed . well worth the upgrade .