Ariss modem speeds are low

What model Arris modem or gateway are you using?  What model Ubee did you replace.  What speed is "low low low"?  Are you testing wired to the modem or over WiFi?

"whqt is 2.4 and 5" - I assume you are referring to 2.4 or 5 GHz, the frequency bands of WiFi.

cox cable service techs wasnt very helpful said something is wrong with line i said it wasnt before they said it had to be i said the tech in fron tof you said it all was good but didnt know about the low speeds 

cox fixing to loose a customer of over 10 years 

Rjamesjr said:

wireless now getting 50 and 30 upload and yes 2.4 and 5 which one should be connected to

The 2.4GHz band is limited to wireless "n" which has a real world limit of 45 to 70 Mbps.  The 5GHz band supports both wireless "n" with the same limit and wireless "ac" which can get you into the 300Mbps range.  The limit is what band / standard your client devices support.  If they support 5GHz 802.11ac then by all means use it.  If you have wireless "n" devices supporting both bands, I would use 5GHz, it is less crowded and less chance of interference.  If your devices only support 2.4GHz, the decision is made for you.  Don't forget, your actual speed is dependent on your distance from the gateway and amount of interference in the band.  This is basic WiFi, doesn't have anything to do with Cox Internet service and applies to any provider you may go with.

from the 23 sept till now still no help jus tlies 

still goin ginto another day shot no tech from cox or a call or a call back from the manager i spoke to yesterday wow all i can say 

thats the problem the one that i went to echange it still figthing with cox tech support gain moire lies