Not getting upload speeds

I have the xb7 rented from Comcast 

Any update to help?

Would love to figure out why I am not getting full upload speeds

@PlanetMars92 My team can look further into your speed concerns today.  To send a direct message, please click on the chat icon in the top-right corner of the screen, and select "Xfinity Support" to initiate a Direct Message. 
Click "Sign In" if necessary
Click the "direct messaging" icon or https://forums.xfinity.com/direct-messaging
Click the "New message" (pencil and paper) icon
Type "Xfinity Support" in the "To:" line and select "Xfinity Support" from the drop-down list which appears. The "Xfinity Support" graphic replaces the "To:" line
Type your message in the text area near the bottom of the window
Press Enter to send it

I am working with support, they have to send out a Tech.  Signals seem low to them.

Sorry, I did not get an email, but received a few texts messages stating the multi gig upgrades have been completed in my area.  

@PlanetMars92​ 

No worries ! Thank you !

Thank you, Kassie.

I will send that direct message in a day or so when I get back from my weekend.

In the meantime, FWIW, there are a couple of things I have subsequently learned while continuing my research on this subject.

Arris actually makes two different modem/router combos that have the same model number, G36. To me, this is not very smart.....but that's the fact. My Arris modem model G36 has four 1.2 Gbps ethernet ports. The other Arris model G36 has the same four 1.2 Gbps ethernet ports, but also has an additional dedicated 2.4 Gbps connection. I have also learned that the modem manufacturers send their firmware upgrades to the cable providers, who then push them to the subscribers like me. I think both these facts may have some significance to my issue. 

I remain convinced that the degradation in service and speed I experienced results directly from action taken by Xfinity, either automated or human-initiated, but it may not be as sinister as I had believed. If my modem/router received a firmware update compatible only with the G36 with the additional dedicated port, it might have mis-set some parameters in my modem, and could very well be affecting others with the same kind of G36. In any event, I would be happy for Xfinity to simply UNdo whatever was done to cause my modem/router to suddenly function at significantly slower speeds. Obviously, my router is fully capable of handling the 300 mbps upload speed I am paying for, and equally capable of providing download speeds approaching 1 Gbps, having done so for six days before Xfinity did whatever it was they did. 

The other G36 also costs from $150-200 more than the G36 I purchased. I would be tempted to go ahead and pony up another $150-200 to get the dedicated 2.4 Gbps port with 1 Gbps upload speed, except that my modem already has a six day performance record proving its ability to deliver speeds that I am content with--including the all-important to me 300 Mbps upload speed in my plan.

I got my issues resolved.  They had to move the powered amp outside and connect the cable modem to the correct port to bypass the amp side.  They also replaced the modem (but did not think it was necessary) and a cable box that was messed up passing voltage back on to the lines.

Now getting 2+Gbps down and 330+Gbps up.

Thanks all,

Eddie

@PlanetMars92

Awesome I'm glad our technicians came out and got everything fixed for you. Do you have any other questions or concerns?