Planned to move into a new home with my sister and need to consider which modem to purchase . i want to start the move off right with save money on the internet bill by own my own modem as it would be my responsibility to take care of the bill each month . I carry out a little research on my own to make sure i get the most up to date and compatible modem for use with Charter . I go to my parent house to take a look at they modem but there be no brand name . they be indeed rent from Charter though . I google the device model and come to find out it be a Ambit now know as Ubee u10c018 which be a DOCSIS 2.0 modem . see as how 3.0 have greater speed and technology i decide i would go with a 3.0 modem . originally i be interested in the Motorola SB6120 surfboard because of the review and its compatibility with Comcast . i figure Charter and Comcast would probably support the same modem model . i actually couldnt find anything on the u10c035 be compatible with Charter on the internet for the longest time . it seem that all the answer come after i have make my final decision ; which be the U10C035 . also , this link set my decision in stone : -lrb- ... -rrb- under the DOCSIS 3.0 datum modem tab . if its on this list then its most likely support by Charter . this be my first choice because of everything that i have read about its performance , reliability , and speed -lrb- 171mbp max -rrb- but at $ 90 + for a use one i just couldnt afford it . i be sway because of the price . its holiday season so i be lean on my second and slower choice -lrb- 160mbp max -rrb- : Motorola SB6120 SURFboard eXtreme Broadband . thankfully i keep look . i happen to find a u10c035 at a pawn shop for $ 60 with everything include and it look to be in immaculate condition so i just have to get it . the Charter guy come out and install the cable to the house which take they 3 hour . but when it come to the internet and modem everything run smoothly . i already have the modem and router hook up for they . all they have to do be install & run the cord , plug the device in , and call Charter . it only take mintue then i be up and run hi-speed cable internet . i run the Cnet 's speedtest and be run at 30.97 mbp down and 2.99 mbp on the up-side . mind you i be only pay for Express tier @ 15mbp . we have 3 laptop , 1 xbox , 1 ps3 , 1 Wii , and 1 Netflix compatible Blueray player run on the Express Tier @ 15mbp . please note that all device arent active at the same time and i understand that with my select tier i wouldnt be utilize my modem full potential . i dont need ` screamin-bleed ' speed . this work out fine for my sister 's and i. for I i just want to stay current with technology 's ever change tempo . i didnt want to have to worry about upgrade if i have decide on a DOCSIS 2.0 modem instead ... apparently sometime next year Charter be come out with another speed increase . I know we 'll be up to par and be able to accept the increase without have to upgrade we equipment for some time now .