We planned to switch back to Comcast/XFINITY after having CenturyLink for a year. Last time we had Comcast we had an awful modem/router/WiFi combo that I desperately wanted to avoid this time around. Not only did I hate that hardware but I had to pay $10/mo. for it!The TM822R looked like it would work for us so I ordered it early and had it on hand when the technician arrived to do the install. I also let them know when I signed up for the service that I had my own router. Comcast did try to say that having my own router might be a problem. They indicated that they won't support it if I have issues but I was determined not to have their hardware or that $10 monthly charge. I told them I have the TM822R and they said it is supported by their system and would work for Internet and phone.The install went very smoothly. The technician was able to activate the modem and transfer our landline in less than 30 minutes.The XFINITY Connect App is working fine too. With it setup our cells ring whenever our home phone rings.I now have a solid internet connection and the voice clarity is also great but it has only been a few days since the install. I'll post an update if anything changes.I ordered the . It works fine for this modem.

Got unit today to replace my comcast phone-wi-fi-router which while generally works OK, is a pain in the posterior re wi fi hotspot and hard to turn off wi fi channels I did not use or want_ I am using a netgear R6400 frouter- wi fi with much more flexibility now attached to my ArrisTM822R. AlSo ordered but yet to receive a $10 8 hour battery backup- much cheaper than the Comcast-xfinity do-all unit. Setup was a little confusimg- but having downloaded the manual and following it ( using a mac mini ) and firefox browser it was relatively easy IF one paid close attention to being sure to renew DHCP lease at the appropriate time. Got internet working- but problem with phone- which customer service was able to help out since I had a cell phone available to call. What the problem seemed to be ( my fault !) was plugginG the male phpne jack into phone2 instead of phone1/2 as a result of not carefully looking at the printing and following what I assumed was the same order as the lights. The other no issue issue had to do with waiting for all green NON flashing in accrdance with online instructions. The flashing light on LINK will always be flashing when connected to internet- all others will be solid green after about 10 minutes or so. Instructions could be clearer- thus the 4 star rating. IF unit continues to work OK- I'll leave the rating at 4 stars. I'm in Wa state and an area which comcast is only service available via contract with city. keeping fingers crossed.FWIW dept - unit provided by Comcast was "Voice and Data Modem"ARRIS Group, Inc. TM822RSerial Number: 2C——DBDUAL BAND WI-FI supplied by comcast-xfinityUnit I purchased"Voice and Data Modem"Arris Interactive, L.L.C. TM822RSerial Number: A4—05PurchasedArris SurfBoardNOTE After a bit of digging I found out that IF yoiu put into your browser the ip numper of 192.168.100.1 you will get a major report- log of all the software and status info. also battery status if used..UPDATE 3 SEPT RE BATTERY INSTALL-...Copied from slip inserted with 8 hour battery for installationARRIS SURFBOARD TM822R PHONE INTERNET MODEM AUGUS 2017Please check the following in place before installing or using your Battery1) You must have an active phone service "provided only by your service provider" on your Phone Modem to use the battery pack.2) Back Batteries only support the PHONE PART of the modem.3) Internet part of your modem is not designed to be used with battery pack regardlessof if you have a phone service or not.4) Make sure your modem is directly Plugged into the Wall. (NO SURGE PROTECTORS OR POWER STRIPS CONNECTED OR APC SYSTEMS).5) Make sure the battery port is in good shape before you insert the battery as in most cases used and or rental modems have bent pins and may create an issue when inserting the battery properly.6) Your battery will now require 12-17 Hours Charge initially.7) A new battery will undergo three battery test stages;(a) an initial full charge,(b) a full discharge after that(c) a full re-charge back to a fully charged state.8) The full process will take about 6 days.+++++ MY NOTE USE 192.168.100.1 TO READ DETAILS OF YOUR MODEM

I have had Comcast for 8-9 years, and have been paying for modem rentals all that time. It started out at $5/mo., then $7, now $10. Up until this point I had 2 separate modems, 1 for internet and one for phone (EMTA). I never wanted one of their wireless gateway all-in-ones because I run my own home network, router and WAP.I wanted to replace my Comcast devices for quite a while, and could have done so for the internet side of things, but there were no phone capable units sold for retail, and thus I would have still incurred the rental fee. I looked at some versions found online (TM722, TM822) but they were generic package versions, and although many reviewers said they were able to get them working with Comcast, others told horror stories about trying to activate "non-authorized" (according to Comcast versions.Recently I found this retail version of the TM822, stating on the box "optimized for Xfinity" which is of course Comcast. It is an internet and EMTA modem ONLY, not a router or wireless access point, which is exactly what I wanted. After receiving it and hooking it up it took about 45 minutes on the phone with Comcast to get it activated, and then a bit longer for the phone service to come back. The next day for some reason it stopped working, but after another call to Comcast it has been stable, with no problems. My internet speeds have not changed (I was not expecting them to since I already had a DOCSIS 3.0 MODEM). I've had it for about 2 months now, the $10 rental charge is off my bill and it will pay for itself in 15 months. Very pleased so far.