ARRIS (SBG8300) - Cable Modem Router Combo - Fast DOCSIS 3.1 Gigabit & AC2350 WiFi ,Comcast Xfinity, Cox, Spectrum & more, 1 Gbps Max Internet Speeds , 4 OFDM Channels

Briefly: this Arris G34 works!As my main concern was about activating it-this review is about activation process only.Activation with xfinity app was eeeeasyyy!!!!( just online with their xfinity app for cellphone) no tel calls, no technicians were needed.And for technologically clueless senior it took about half an our maximum. I found all info I needed through my personal “best friend” - google :) After the modem connected and appeared in the list of local WiFi’s ( with names which are on the label of modem - 2 actually, one for each band- 2,4 and 5), so I first connected the cellphone from which I was activating( entered p/w) , for each bandwidth, then other family cell phones, then computers, then tv. Connections were soo easy.And everything seems to work just fine( better and easier than with our original old modem)I decided not to bother and just to have 2 different networks ( names) for each bandwidth , rather then unite them under one name, as it automatically chooses best frequency bandwidth) and I can see then which one is working )Though I should really mention in this review that during 2 last days I had been prepared and trained well already for the activation of this Arris modem. Because my first attempt was an incredibly stressful experience with Motorola 8702 modem combo refurbished in mint condition( also bought on Amazon here).( which I happily returned today(the return window is very reasonable) It took unbelievable amount of time and energy, for hours chatting with xfinity assistant, tel calls to and from xfinity, finally appointment with technician, and all that circus was just to find out that this refurbished Motorola modem was just plain defective. We certainly could not sit without internet ( at this point our old Motorola modem and refurbished newer Motorola both did not connect) So, I just rushed to look on Amazon for a really new modem combo compatible with xfinity, ( and with fastest delivery !) ( and I was checking release dates for all modems - to have a fresh one) Found out that ArrisG34 was released not that far ago.That is how I chose new Arris G34 here.If I ordered this Arris modem combo as a first choice, I would not even know what other people can go through , and why some reviews are so negative.Though in my case - I consider it as a valuable experience, and I certainly acquired some useful skills through the difficult first attempt of activating refurbished Motorola modem.But how glad I am that it is done, and I certainly can relate to good reviews , when people bought good new product from their first attempt and therefore activation process was as it is supposed to be - easy and not long at all, though it took some patience and anticipation, when the light on Arris was blinking different colors , but finally stabilized in stable blue. Xfinity app is leading through all steps of activating , and half an hour max - actually for me it was a breeze.Oh, and I read that if you want to change the name of your WiFi network for something more fancy, better to do it by reaching xfinity , so that they do it, as their app does not give this option ( which did not bother me) Also I am glad that I did not install arris surfboard smth. app( did reading that it is useless and not needed, only could confuse) In my case it was really not needed.I used plainly only Xfinity app for activation, nothing else.So, that was review about activation process and initial impressions. I hope that our new modem combo Arris G34 will work reliably !( if not, I will most probably update this review)

I purchased this ARRIS SBG8300 gateway new from Amazon for $177 in May 2024 to switch from AT&T DSL2+ (copper landline) to Sparklight cable internet service (100 MBps down/ 10 MBps up). I decided to purchase and own it myself, rather than pay rental fees- it should pay for itself in about one year. I wanted an established DOCSIS 3.1 design (3.1 is required by Sparklight) that could handle possible future cable bandwidth upgrades, and this gateway seemed good for that. It has 32 x 8 channels for DOCSIS 3.0 and 2 x 2 channels for DOCSIS 3.1, and can theoretically handle up to 4 Gbps download speeds, so this is probably way more gateway than I need now.The Sparklight installation tech told me that this was the first time he had encountered a new customer who provided their own gateway in my rural MS town. This turned out to be a minor problem, as he had always been given the gateways pre-configured. Initially, he was unable to get it up and running, and he had to run off to perform other installations (Uh-oh!). But the Sparklight phone support people were very good, and saw that the gateway was simply waiting for a firmware update. Apparently, firmware updates are something that only the cable company can do. Sparklight was able to push the update remotely, and I was off and running.Configuration was pretty straightforward. I should warn potential buyers that the gateway's firewall is set to WEAK by default. I decided to switch the firewall to MEDIUM, and discovered that I could no longer access the gateway configuration page directly using the http:// browser connection. After going to MEDIUM, it only allowed https:// browser connections. So, you have to go through a few extra clicks (accepting the risk, etc.) in the browser to reconnect to the gateway's configuration page. With all of the warnings, etc., it is easy to believe that your new gateway may have been hacked, so be prepared for that. Make sure that you turn off UPnP for added security unless you need that. It is also a good idea to do a port scan to make sure there are no unnecessary open ports that could present good targets for hackers.Performance has been excellent, delivering over the purchased speeds (usually, I get 110 Mbps download and 20 MBps upload via speedtest.net). I have not had a single problem after about 1 week of service, have never needed to do a reset, and the gateway seems to be running cool, just above room temperature.I think that most problems that people experience with cable modems/gateways in general are due to 1) poor line signal quality and 2) WiFi crowding/interference issues. The SBG8300 provides line quality information in the homepage, so you can troubleshoot signal issues yourself and perhaps avoid extra service fees if the problem is inside your home. I did not try the gateway configuration app for wireless devices- all of my tweaking was through a hard Ethernet connection and web browser. FYI the gateway homepage did complain about my Firefox version 126 (some warning about needing at least v 63) , but it worked OK.I guess that the only features that I wanted, but couldn't have using this gateway, are:1) WiFi 6 - this gateway has the older WiFi 5 (802.11ac) standard . But our current wireless devices can't use WiFi 6 anyway, so no biggie.2) No USB port on the gateway. This is very handy if you want to do network printing via USB, or set up a large USB stick as a network drive (NAS).Overall, I really like the performance of this gateway. Time will tell if the hardware is as reliable as it appears to be.-----------------------------------------------------------------------------------------------------------------------7/24 Update- No problems after ~ 60 days, very pleased. After doing a little more research, it turns out that there are some interesting reasons some cable modems fail. It all goes back to the original cable concept as a distribution system for ONE-WAY analog TV signals. Cable modems must both receive and send digital signals. If the DOWNLOAD line signal quality is poor, you will get disconnect/reconnect issues- everyone knows that. But the more serious issue is with the UPSTREAM signal. The cable modems will try to overcome poor line quality conditions by BOOSTING the UPLOAD signal. This leads to greater continuous heat generation inside the modem, and sometimes failure due to overheating. So, the reason some folks need to replace their cable modems regularly is due to the poor line signal quality, not necessarily the modem itself. You can fix this with a special amplifier called an active return cable modem amplifier (Amazon sells these), but the permanent fix is to get the cable company to change out the cabling and components to get a good baseline signal.