NETGEAR Nighthawk Cable Modem CM1200 - Compatible with all Cable Providers including Xfinity by Comcast, Spectrum, Cox | For Cable Plans Up to 2 Gigabits | 4 x 1G Ethernet ports | DOCSIS 3.1, Black

Bought this modem 5/10/25, Open box item, very easy install using the Xfinity app on phone, Up and running already 718Mbps download, 40mbps upload, seams like everything is working good so far, Thanks for the awesome deal Amazon!

Actually did improve my internet speeds compared to the modem provided by my ISP. Makes my internet bill cheaper also because I’m not renting one from ISP. Make sure it will work with your ISP before purchasing, if it does I would recommend.

I've had the CM2500 for about three months and it's working great with Xfinity 600Mbps service. It actually solved a problem with my work VPN and dropping issues (via HP/Aruba device). Starting around Dec 2024 my work VPN would drop about every 5 mins, happening about every day (was using a Motorola DOCSIS 3.0 modem). I tried the Hitron CODA56 modem (DOCSIS 3.1) and same problem. With this modem no VPN drops since installing and overall connectivity has been very reliable.

I purchased the CM1200 in August 2020 and received it 8/8/2020. I attempted to connect the device at home as it was replacing the CM500. I have an AC1750 Netgear router that was connected to the CM500 and is now connected to the CM1200. I spent 5 hours the first night working with Netgear and my ISP (Comcast) to setup the device correctly; I was unable to use the activate link and had to call Comcast. While on the phone, Comcast stated because it's a Netgear product, Netgear would have to provide the firmware. However, Netgear's knowledge base states Comcast actually pushes the firmware. It started to feel like I was in the middle between Comcast and Netgear. This should have been an easy experience - plug and play - just like I have done with many other computer hardware.Once the device was setup, it worked well for about a week. The following Sunday I contacted Comcast again because I no longer was getting internet service. Comcast could not see the modem. We went through normal troubleshooting of a power cycle of both the modem and router. Internet service resumed. A little later, Comcast could not see the modem again. Went through the same steps and it was back.Comcast sent a technician out on 8/18/2020. They changed connections outside of my place. Also pushed all the service to one cable connection in my place; all other cable wall outlets do not have cable as I'm trying to ensure all the service is going to where I am connecting my internet and TV (I've been in this place for 4 years and did not have this problem previously until recently).The following Sunday I contacted Comcast again and went through the same steps. The following days I had to restart my modem each morning because I no longer had wifi when I got up to start work. I contacted Comcast 8/27/2020 to further discuss the issue. The first time we went through the normal steps of trying to restart the modem, unplug the modem, attempt to make a connection from Comcast to the modem, etc. Internet service came back... for an hour. An hour later I contacted Comcast again and they pointed me to Netgear. Now I really feel like I'm between Comcast and Netgear and no one taking ownership of the problem.After speaking with Comcast on 8/27/2020, I entered a support case with Netgear. I contacted them on 8/28/2020 because Netgear apparently does not reach out when a case is entered, it is up to the user to contact them after creating a case online. At 4 PM on 8/28, the Netgear technician had me reset the modem, unplug the modem, unplug the router and then reconnect everything. I explained I do this on a daily basis, but went along. When this was done, internet service returned... as expected. The tech said to monitor the internet for the next couple days to see if the problem persists. I told him I know what's going to happen and that I will be contacting Netgear again before a couple days ends. I asked if they could just send a replacement because I've been dealing with this issue for 3 weeks at this point, and he said just monitor the internet service.At 8 PM on 8/28 (4 hours after reaching Netgear) I was on the phone again with Comcast because internet service was non-existent. At 8:30 PM I began my hour long hold with Netgear following up on my open case stating what I told the prior technician that I would be calling Netgear back because I would no longer have internet service. We went through similar steps, however this time the technician had me change a setting on the router.I'm expecting I'll once again be contacting Comcast and Netflix on either 8/29 or 8/30 because the internet is no longer working for me.At this point, I'm caught between Comcast stating that I'm using my own device and they can't support that, and Netgear saying I have 90 days on my service warranty. Meanwhile, I have intermittent internet issues causing me to use my mobile hotspot to work.I will say Netgear tech support has been pleasant once I get through the queue, but I've been on hold 30 to 60 minutes each time I call and then another 30 to 60 minutes troubleshooting. I've also had to repeat many details along the way when I call, however, so that's frustrating.I'm hoping this gets resolved, or I'll have to work with Amazon to return the modem and hopefully get a full refund.

Upgraded from the CM600, which I had been using for 10-years with Xfinity without any issues. The CM1200 doubled my speed and was needed to get the most from the 1Gbps package. It tests at 987Mbps down and 42Mbps with my Xfinity package. The Ethernet port is only 1Gbps, so that may bottleneck the speed going to a router with a faster port. The other 3 ports on the modem don’t get used in the standard residential setup. Xfinity only certifies this modem for 800Mbps and the product box says it in small print. Cox and Spectrum are 1Gbps. Really liked the CM600, so I’m hoping the CM1200 will be just as reliable. It was easy to switch it out using the Xfinity app on my cell phone.

Just purchased Nighthawk 3.1 modem. The setup required us to call our internet provider to set it up (unlike what the directions say about doing it with an Ethernet cord and laptop), but it was fairly quick and easy. It has run smooth ever since.

Replaced an Arris Docsis 3.0. Download improved 80 M bs and upload doubled.

I switched from an older Netgear Gateway to this modem with an Eero router system. The modem installation was easy. No laptop connection was needed with my Xfinity ISP because the new modem can be installed via the Xfinity app on a cellphone. I think most big ISPs work this way these days. After the indicator lights settled down (about 10 minutes) I hooked up the Eero router and used it's cellphone to set up the WIFI network. Easy-peasy. My speed is incredible.