My installation is only 6 days old and my only choice for "Gb" service was to rent their XB6 modem/gateway.  I have a tech coming tomorrow and hope he has a Technicolor CGM4140COM for me since I swapped the Arris for another one on Monday with the same issues.  I specifically asked them for that model and asked for a supervisor to call me before the service visit to discuss, but I never received one; guess I probably won't be getting a Technicolor tomorrow either.   The original was HW Rev. 11 and the replacement HW Rev. 10.  CPU/RAM were slightly different.  They both had the following versions: eMTA & DOCSIS Software Version:  2.0.2.209 Software Image Name:  TG3482_2.8p20s1_PROD_sey BOOT Version:  0.1.9.430478   After setting up the hardware for my environment, I noticed things were changed on me the following day.   Gateway > At a Glance no longer showed connected devices which is annoying, especially since it showed a bunch of MAC addresses from 00:00:BF:01:xx:xx that I was trying to hunt down.   Both SSID Network Passwords get changed to the first password ever set.  The first unit was partly setup by tech and had me use his phone's WiFi which I was reluctant to do so and used an easy SSID and password I later changed.  And, the default connection was HTTP!  The XB6 (or should I say Comcast?) kept changing to the first password the following day; didn’t like the fact some else’s device had access.  The worst part was the default user/password was active when I logged in via Ethernet cable and NEVER asked to change it.  Imagine all those people out there with default passwords who are not savvy enough to know this!  The second XB6 I got kept changing the password back to the default from the bottom of the unit.   When navigating to Gateway > Connection > Wi-Fi, I always get a pop-up box: Alert Failure, please try again.   MAC Filter Setting for both SSIDs get changed to Allow-All from Allow and doesn't let me change it back.  Always get a pop-up box: Alert Failure, please try again.   Connected Devices > Devices no longer shows any devices and trying to add DCHP reservations becomes a real chore since you can't disable it.  I suspect the Prefer Private Connection has something to do with HTTPS but enabling/disabling it caused me headaches with not being able to get back into the UI that I left it on.   Parental Control > Managed Sites is now broken although I wasn't using it, but you can't select the sub menus.  I tried enabling/disabling the Managed Devices but was having trouble with one segment and not the other so decided to give up on it.   Troubleshooting > Network Diagnostic Tools Check for IPv4 Address Results quit working and shows Error     If I do get a Technicolor model, I’m hoping I don’t suffer from the above issues.  I especially don’t want to have the below limitations as well since I will probably drop phone service with them and just get a DOCSIS 3.1 modem of my own.   The bad of this model: One light to rule them all - No activity, WAN, LAN, telephone etc. lights (A single light that changes color during boot up and hopefully a working connection when it's white, except for phone of course, you see no indication)   No default battery backup for phone, you must buy separately   Very limited UI   No way to change the last octet on the LAN   No way to change the subnet netmask on the LAN   No way to disable DHCP on the LAN   Password is limited to 20 upper/lower case letters and numbers only   The IPv4/6 firewalls are a total joke (to include the lack of usable log info) and defaults to Minimum Security (Low)   The default connection is HTTP and no indication HTTPS is supported   WiFi passwords are visible on any connected TV and even your account   My speeds have been inconsistent with a system directly connected to the back of the XB6 for testing (300-900Mb (saw that max twice) typically maxed at 700-800ish) ... View more