Arris CM820A DOCSIS 3.0 Cable Modem – Fast & Reliable Internet with IPv6 Support

Excellent product!

Great. Is doing the job beautifully. I had been renting the same model Modem from my Cable provider for the past 2 years at $5/month. Had I known all along that I was renting, I WOULD HAVE PURCHASED 2 YEARS AGO!!!!

Just what we needed

This was the easiest installation I’ve ever experienced with a modem or router. I barely had to do anything! Didn’t even have to call my carrier..I just opened a window after I fired it up and it communicated with them and I was on the ‘net in no time. I bought this one because I had to upgrade due to carrier upgrade it was the cheapest one on their list of compatibles. Great find! I’ve always had Arris/Motorola modems and they’ve never let me down.

I’ve had this for almost a year now and the Internet is fantastic. I’ve never had a problem with it and even the Comcast technician was a little startled by the speed.

So far it’s working great and much faster than my previous modem. It was a very easy install. I’m using it for Comcast/Xfinity internet and after I installed it, I called Xfinity to get it activated. What’s nice is that it comes with extra SN and CMAC stickers so you don’t have to be sitting right next to the modem to give them a call. They also asked for make and model number. It took maybe 10 minutes for them to activate it, it was also later in the evening for me. They also said I’m now eligible to upgrade to X1 for free, which will be nice.

Setting it up was really easy and simple and I haven’t had any problems with it! Worth it!

Modem was just as advertised. Turns out, I had the same one already.

Has worked great and easy to set up in just a few minutes…

Works great, easy to use and install.

Came in on time and works great!

Saving $8.00 per month for buying instead of paying Cablevision.

Worked and did what seller said it would do!

Worked as advertised.

Works great. Arrived quickly. Took only minutes to activate with Atlantic Broadband.

This is a solid modem. It handles the internet connection & speed well. Unlike other modems, I haven’t had to reboot this one every few days. It also is nice to know I’m not renting a modem from Time Warner for $8 (plus taxes & fees) a month.

This is an Excellent Modem.Be warned, however, Comcast will NOT want you to use this modem, and may give you fits once you install it. They dropped my speed (which was supposed to have been 50, but Concast gave me some bs about the splitter that we have to use cutting the signal in half, which I bought because it seemed logical) from 35 Mbps down to 6 Mbps. Then, they started cutting the signal out up to 20 time A DAY! When I had the 1st tech come out, he did all he could, got no improvement, BUT the tech that he called on the phone said that there they were experiencing outages in the area. (Which did not make since, since I still had a picture on the TV, but what can you do?) He said he couldn’t do anything else, and would have to come back again. He scheduled an appointment, but never came back.After about a week of waiting, I was furious and called again, requesting another tech agent come out. He did and did everything the 1st guy did, with the same uneventful results. I finally capitulated, desperate for a constant signal at the appropriate bandwidth, and agreed to have him install their New super-duper Concast Modem+Router, though it was going to cost me a monthly fee. Well, surprise! It gave me the same 6 Mbps signal! LOL So I said, “Forget it, just install mine again.” They did, and IMMEDIATELY AFTER they Re-Installed mine, I got 50 Mbps! (Undoubtedly, it finally went though their system that they had installed their own Concast Modem+Router, just a minute after it had been uninstalled!) Then, it dropped back down too 5 Mbps!!!!!!I talked to the tech, and he was flabbergasted that I has the 50 Mbps screenshot to show him, and the current 5 Mbps speed to compare it to. He called the problem “systemic” – meaning there was nothing he could do, and basically confessed that it had to do with the person he called on the other end of the line, who AGAIN claimed that there was an outage in the area (because that is Concast’s default excuse). He also said that he had installed plenty of splitters and a single splitter would not cut my internet speed in half. So, he left.Then I called Concast again, late that Saturday, and I was Irate. I told them that I knew what they were doing, that there was NO REASON my speed should go up to 50 then drop down inexplicably to 5 other than the fact that THEY were the cause of the problem. I asked to make certain that the call was recorded. I demanded that it be played for a supervisor. And I threatened a class-action lawsuit if they did not fix it. Oh! And I also requested that another tech come out and Re-Install their New super-duper Concast Modem+Router. (I did not say so, but I planned to get the next installation on camera.) Then, after the call, I took the survey that they’d asked me to take, and I trashed their customer service and said that I would not recommend them. When they asked why, I recorded a very irate message for them.Interestingly, the tech that I requested to come out and install the New super-duper Concast Modem+Router never came. However, my speed did jump up to the Blast speed of 75 Mbps (which is what it is now supposed to be), and it has remained there with little to no interruption.

Works perfectly. Had to phone cable company 2 times to get it going but now I am so happy to no longer pay rent on a modem

Works well. BUT, I had to purchase 2 of these. First one was a dud (or that is what cablevision said … I don’t think they like giving up their requried $5/mo lease).Device works well. But you really have to get the EXACT SAME MODEL that they gave you … otherwise, for whatever reason, they won’t activate it at all ($5/mo may be the reason).

I ordered wrong one

Great!!!

I had another Arris DOCSIS 3 cable modem and liked it, but moved and the new ISP required a different modem. This was the one.No complaints. Seems very speedy and I’ve had no hiccups in the month I’ve owned it.Good value.

I use this modem with Comcast and have to say that my speeds increased dramatically with the 8 x 4 channel bonding. I use a Netgear router and it works seamlessly and I have no problems with the connectivity through Comcast. Would highly recommend if you are looking for better performance for your internet.

Easy to install and maintain. solved the problem of getting disconnected with the Comcast Internet service. Works well with my current router.

It’s not beautiful by any means but the performance more than makes up for it. Using it with Comcast Cable in March of 2016.The 802A is actually the retail model of this device and is on Comcast’s approved equipment list while this 802 was meant to be distributed by cable providers and is not on the list. However, it will work and was easy to set up.When you call Comcast to activate the equipment just tell them it is the 802A and give them the seriel number on the device and Comcast will be none the wiser (it shouldn’t matter anyway, but better to play it safe).Took about 10 minutes on the phone to get it activated.Provides stable performance and is better than the equipment Comcast provides these days.Buying your own modem will save you $10 a month on the equipment rental, paying for itself in just a few months.I have Blast speed from Comcast and actually get better than advertised speeds with this device (90 Mbps down and 15 Mbps up).Make sure you have your own wireless router if you want to set up a wireless home network, as this device is just a simple cable modem and not a cable modem/wireless gateway like the equipment you likely have from Comcast right now.