NETGEAR Nighthawk Cable Modem CM1200 - Compatible with All Cable Providers| For Cable Plans Up to 2 Gigabits | 4 x 1G Ethernet Ports | DOCSIS 3.1, Black (Renewed)

Was delighted to find renewed unit sold at less than half the retail price (which is high because the CM1150 is the only Xfinity approved "customer owned" modem offering phone VOIP as well.Using Xfinity phone app, I was able to set up and activate this modem quite easily. My phone service worked and I measure internet service at 800mb/s... per my Xfinity plan. I streamed a movie that night.. No sweat. I was about to take my original Xfinity Gateway back to the store when suddenly I noticed internet was struggling. eg. my wife was on zoom chat that was halting. I was using google translate and it was taking a minute to do simple translations. Within 2 hours, all internet was dead. Phone stopped working too.I unplugged the CM1150. Put outside to quickly cool. All to no avail. Re-starting failed to get any functionality back.I then re-activated my Xfinity gateway box. (BTW: That cannot be fully completed using Xfinity App. Phone worked, but internet data was inoperable. That's because special "codes" at their office must be reset before Xfinity will deliver broadband data to that original Gateway modem. Only a live chat session or getting an agent on the phone can get this done). Once up and running, the Xfinity gateway was working normally and reliably.I'm going to hazard a guess. This COULD be an issue of marginal signal strength over the Comcast cable. I am skeptical anything actually broke in the Netgear CM1150. I've had the Xfinity gateway for 2 years and internet loss was only very occasional. My hunch is that the Xfinity equipment may work better as depleted signal levels. I'll probably hold onto the Netgear modem and re-try it in a month- would prefer not to pay the $15/mo rent.UPDATE (2.21.2024)I've been monitoring signal levels in the Xfinity connection status. The signal strength in my family room location is lousy... varying between -15 dBmV and -10 dBmV depending on day, time of day.,etc.I built up a location to place the cable modem very close to my home's Xfinity cable ingress & powered distribution box in my basement, running CAT5 + Phone wire to first floor wall jacks for router & phone base. The Xfinity Gateway experienced 3 - 4X higher downstream signals at the basement location compare to distant family room.Then reinstalled & activated the Netgear CM1150 . Everything came up working within minutes. With just 3 feet 75 ohm coax to the CM1150 from Comcast powered splitter, signal levels between -3 and +1 dBmV are reported by the CM. That's plenty of margin to deal with daily variations that will be in 5 dBmV range. Feeling confident I can dispense with the Xfinity equipment and rely on the Netgear CM.Revising my rating to 5*. Very pleased!

This is work as advertised. Would purchase again in the future.

Bought this modem refurbished and labeled as in excellent condition. The modem had a 90 day warranty also. It worked good with no problems for just under 3 months. I started having internet connection problems. The ISP came and checked all the cables, The internet was back. Then it would connect intermittently. I called the ISP again. This time they did some tests which were OK, except for the speed test through the modem. The speed test through the cable was fine, but the modem wouldn't connect.After determining the modem went bad, I called the Netgear rep to check on the warranty. By this time I was 12 days past my 3 months because of the 2 cable provider visits. I explained all this to the Netgear rep.He told me there was nothing they could do since it was past the 90 days. He wanted to sell me a plan which would cost me $169.99 and we could try to get it working that way. The plan also covered other electronics in the home. They had already gotten $99 from me on a faulty modem. I had to buy a new modem. this one from another company and it's been working flawlessly, so far. Be careful if your considering buying refurbished electronics from Amazon.

Connected right away. Great speed. Using it on Xfinity with no issues.

I am... not an Xfinity fan but they have a monopoly in my area but that's life. Recently my old modem was made no longer supported from Xfinity's side so I needed a new one. Of course they decided to hit me with the "if you use our Xfinity modem then you'll never have this problem" well no thank you - you save more money before even a year if you just get your own modem/router scenario.Anyways get this one or the Arris s33 as they are comparable - if you're going for a lower cost solution with a wifi setup. Note: this does not have wifi it's just the modem. This one is slightly cheaper compared to the s33 but the s33 is more "future proof". I say this in quotes because while the s33 has a 2.5gbps ethernet port while this one only has a 1gbps, that doesn't mean it won't be made incompatible again in the future because of other updates on Xfinity side (both of these are around 2019/2020). Also 2.5gbps is a lot and you likely aren't hitting that (and by the time we do I'm almost certain these modems will again be out of date).You can set it up on the Xfinity app as well, if you have trouble I recommend you use the chat and just immediately ask for agent and either chat or have them call you (just keep spamming agent if you can and then select internet if needed)

This cable modem is docsis 3.1 and I max out my 500Mbs subscription with it. MY actual speeds are usualy in the range of 560 mps download and 55 mbs upload. The product came with the guide and cables. As far as I can tell it is just as good as a brand new one. I also took an assurion 3 year warranty for an additional $13.50. This si the best investment I could find on any site for such a quality product.

Ok so I decided I didn't want to rent my modem anymore I'm sick of paying cable $15 a month so I purchased a high speed hitron modem and it kept glitching so I order this cm1200 to with my netgear mesh routers because I figured they would play well with each other and i was right. I gained about 50mbs and dropped my ping to a 5 which is very impressive the hitron worked just not as well as this one. I pay for 1g service and get pretty close to that speed now I couldn't be happier with this modem I highly recommend

This did not come with a user manual or any paperwork whatsoever. Did not set up easily, so couldn't tell if it was the router, modem or internet company...paperwork would have come in handy and saved time.