ARRIS Surfboard SBG6580-2 8x4 DOCSIS 3.0 Cable Modem/Wi-Fi N600 (N300 2.4Ghz + N300 5GHz) Dual Band Router - Retail Packaging Black (570763-034-00)

So far, I am totally impressed with the ARRIS SURFboard SBG6580-2 modem! Activation through Comcast (Via the self-activation site) went better than I expected. Upon my first attempt, as the modem was being recognized by Comcast, the signal suddenly dropped and I had to start all over again. At my second attempt, everything went smoothly and I was notified that my modem, was now activated. Yeah!! Note to Comcast customers, have your account number along with your phone number ready, in order to complete the self-activation methods.Results: Rental (ARRIS TG1682G) -Ping 12 and above--Download speed: 70 to 80 Mbs, at high peaks (PM) and 110 t0 120 Mbs at low peaks (AM).VSARRIS SURFboard SBG6580-2 -Ping 6 and above--Upload/Download speed(s): Similar but with one notable difference, signal strength remainsimpressively strong.*Will update if there are any changes.

ARRIS SURFBOARD WORKS PERFECTLY WITH GRANDE COMMUNICATIONS IN TEXAS. I have had this modem for three months and haven't had one problem with it. Grande Communications here in Texas is a great company, but the rental modems that they have are pure junk. I bought this to replace the rental one that I had and it has been working like a champ ever since. Grande's system only works with a few modems that are on the market for sale, and this Arris Surfboard paired up with their system perfectly. It's FAST and reliable and I would HIGHLY recommend this modem to anyone, but especially for Grande customers. 5 STARS!

I bought this item because of the price, the reviews and because they market it as working with Comcast Xfinity. It IS a good price, especially since it is a modem and router, however I should have read the reviews closer. After a week or so of use I began experiencing frequent drops in internet service because the unit was rebooting. I contacted support and they took me through the steps of assigning a channel to the the 2.4 and 5 GHz frequencies, rather than being set to Auto and competing with other WiFi sources in the area. I thought "Great. That will take care of the issue." But after some time it continued. Calling again I got the tech who was probably in training because, though very nice, was reading from the protocol materials. Never really a good sign. He said they would replace it, and though I was under warranty I would either have to send my unit in and wait 5 to 7 seven business days after they received it to get a new one for free OR pay $9.50, $15.50 or $35 for them to send a replacement first with varying times of transit. That's when the verbal wrestling match started. He didn't relent. I asked to speak to a supervisor. We wrestled, all the while through both matches I reminded them I'm still under warranty. After reiterating many times their return policy the supervisor steps away for a moment and comes back to say that because I'm under warranty they will now replace the unit, sending a new unit first and waiving shipping costs. I was quick to say that's what a warranty is supposed to be. While on hold the last time though I looked back at the Amazon reviews more closely seeing comments that even though the product is marketed as working with Comcast Xfinity many users have had difficulties similar to what I was experiencing. While still on the line I begin looking for a replacement. I was transferred back to the original support person to take care of the shipping, etc. and we get to the point where he asks me for my credit card information to insure they will get their product back (and I am fully committed to what is most likely false advertising and/or a bad product). We are at an impasse, while I look at my original purchase date to see if I can return it to Amazon. I ask to put the replacement on hold, hang up, continue looking for a new product and contact Amazon to begin the return process.I should also mention that I found out in an earlier call to Arris customer service, prior to experiencing the cut out issue, that even though the product is marketed as "dual band" it is not "dual band concurrent," meaning you either have to have it set to 2.4 OR 5 GHz. It does not broadcast both at the same time and therefore you cannot go back and forth easily depending on strength of signal and/or proximity to the device. More misleading marketing.Lengthy, yes but I think important to know what you are getting into with the product and the company. Arris and their product get one star. Amazon get 5 stars for taking it back.

My first review sung this modem's praises, but it's more of a swan song now. I had this modem less than a month when I started having issues. CONSTANTLY dropping signal. Far and few between at first but then escalating to constant interruptions in service. Called Arris. They blamed a weak upload power Dvbm. Called Comcast and scheduled a truck roll. Basically, Arris was blowing me off. Modem is working fine, but the wifi has steadily disintegrated until now it drops all of the time and my phone can't sustain a connection to it at all. Rather than battling and playing the blame-game with Arris again, I'm swapping the unit out. An absolute waste of money.Update: Amazon was kind enough to refund a good portion of my money on this. I did end up getting a replacement after the cable guy said it was most likely the wifi was just shot. He was really helpful, but that was 60.00 worth of advice I had to pay because the Arris rep did not know anything he was talking about and made me believe it was my service provider. This time I paid the less-than-2 dollar warranty from Amazon in case it messes up again, but so far the new unit is working well. There are times when it lags just a bit, but I've been very happy with it, and it suits my needs well. One star deducted because the first unit broke and the horrible customer service from the company.