Well I tried Netgear Support and they were zero help....I have the C3700 - 100NASEverything worked fine for a couple of months but now nothing except my 2 computers connect and works like normal with the router.My cellphone, printer and TV all say they are connected to the router and when I log on to the Genie it also says they are all connected.However the internet/apps load incredibly slow or don't load on my cellphone. The printer keeps saying it loses connection to the computer and the TV won't load Netflix or anything else. If i reset the router everything will work fine...for about 2 minutes. I've tried resetting and there is no signal interference. I cant seem to figure out why my computers work fine but nothing else does...any ideas?

Not a happy customer...You all are correct. Netgear support is useless. I've had nothing but problems with the C3700. I have the same problem as many of you. My problem seems to be with 5G on the C3700. But there appears to be no way to turn off 5G signal even though manual shows screenshot where you should be able to turn it off. My screen looks the same but without the option to turn off 5G. I've rebooted this modem more times in the few months I've had it than I ever did with my other netgear modems in the last 10 years. Lately, Comcast even told me that the problem looked to be the modem.Second problem...The updates page had a VPN hotfix. Ran the hotfix and got an error. Phone support wouldn't support it because I'm just past the 90-days of the free useless support. I've also seen something on the Netgear site where the C3700 doesn't supposedly support the hotfix, so why is it on the update page for the C3700?I can now understand why this modem got only a 1-star rating and didn't even make the list for the best known modem manufacturers. Netgear used to have great products...what happened? Now heading to buy a better brand rated modem for less than what I paid for (what I thought was) a quality Netgear product but actually works better as a paperweight.

Yes, the 90 day support is stupid. I now want to use this readyshare that is required if I want to add an external drive to pull from onto the modem/router, N600 C3700. Can't seem to do anything with it. The manual states how to do it, but nothing stated in the manual is available. I have spent 2 days trying to figure this out to no avail. So seems worthless. I spent all this money for what was at one time considered a very good piece of equipment. I have learned in the last few months I will never buy a netgear anything ever again, and have been busy telling everyone how worthless the company is in support. I know I use to see this external drive when I had it hooked up months ago, but now it is lost in never never land.

If so many customers are having this same problem, why is Netgear not helping us fix it? That seems like the rational thing to do.

I too am having QoS issues....latency and poor bandwidth using c3700 modem & router with Comcast Xfinity....while using wireless and/or wired. Web pages render slowly and Microsoft Lync calls are garbled intermittently. It was working well till a month ago or so; since then performance has degraded intermittently to the point its impacting my productivity. Comcast if of no help, and can't find any support on Netgear. Is this c3700 model a lemon? Or was some firmware pushed down unbeknownst to me that is now mucking things up? Currently v.1.01.11. Tried factory reset to no avail. Any thoughts or suggestions?

I have the same exact problem. Worked fine for a month now, I have no internet access, but I am "connected". Same problem on WiFi and Ethernet.However the guest network wireless LAN works perfect!I noticed the IP range for the guest network starts at 192.168.1.1,0.For the primary LAN IP it starts at 192.168.0.10.Tried resetting the router etc.

c3700 connection issue | NETGEAR Communities

46 Replies

ryldup
Novice
Apr 15, 2015
Submitted a ticket for essentially all the same issues. Waiting for a response. This seems to be the major issue with all of the C3700's. Connection issue, connection issue, connection issue. I ran the VPN hotfix, hopefully that will fix the wife's issue connecting to her work. changed the channels to limit the interference with the neighbors wifis. I'm hoping that this will be fixed quickly. Annoying to have dropped connections and not connecting on the phone or tablets correctly.
Babylon5
NETGEAR Employee Retired
Apr 15, 2015
If you go to the Downloads area and search for the C3700 you will see no firmware listed. Netgear provide that router to ISPs, and the ISPs provide the firmware. Netgear cannot provide support for firmware issues if they don’t produce the firmware.
- Polarlaw06
  Initiate
  Aug 01, 2015
  That's funny Andy. I've been dealing with the exact same issues as the other folks on this board for the past two weeks. When I called Comcast and insisted that they push the firmware down as noted on Netgear's site, the response that I received was that Comcast only pushes their firmware to register the modem - not Netgear's. If that's the issue, then why can't we update it manually like other modem/routers??
  - wil12ken
    Aspirant
    Aug 16, 2015
    Having same intermitent issues as described in this thread. I have sent an email to tech support but doesn't sound like I should get my hopes up. I will pass on anything I find out. In the meantime, has anyone had any luck/progress on stabilizing their performance issues? I did a complete factory reset and performance was much better then a regular reboot but within a single day it already froze up and required a reboot.
ashkul
Novice
Apr 17, 2015
I too am having QoS issues....latency and poor bandwidth using c3700 modem & router with Comcast Xfinity....while using wireless and/or wired. Web pages render slowly and Microsoft Lync calls are garbled intermittently. It was working well till a month ago or so; since then performance has degraded intermittently to the point its impacting my productivity.

Comcast if of no help, and can't find any support on Netgear. Is this c3700 model a lemon? Or was some firmware pushed down unbeknownst to me that is now mucking things up? Currently v.1.01.11. Tried factory reset to no avail.

Any thoughts or suggestions?
Babylon5
NETGEAR Employee Retired
Apr 17, 2015
The source of the firmware is usually Netgear (maybe always, not sure about that), but it is provided only to ISP and includes ISP required modifications. So while Tech Support may not be able to provide a firmware solution there is still be some value in contacting them to see if they can help, especially since not all issues are firmware related and they often have answers to common problems. Where support cannot resolve the issue then it will still be logged and may lead to a firmware update in the future, however that still requires some discussion and action between Netgear and the ISP, which can unfortunately be slow.

So no, you don’t really have a ‘lemon’, but unfortunately due to the nature of the Netgear/ISP contractual setup changes can be slow to filter through, and if there is no ‘firmware solution’ then both the ISP and Netgear should offer some level of advice / investigation.
ashkul
Novice
Apr 23, 2015
Does anyone know the current firmware version for netgear c3700 for Comcast Xfinity? The netgear website lists v 1.01.05 for my model and ISP. However my actual device shows v1.01.11.

For those having issues with Comcast and the same netgear cable modem router, can you please check your firmware? Wondering if that's what is causing the frequent latency issues and connection drops (even when on Ethernet cable) and wifi signal degradation that started a couple of months ago.

ash
LJ1221
Novice
Apr 24, 2015
My firmware version for c3700 also shows v1.01.11 for comcast and I also see that netgear has v1.01.05. I just purchased the router 2 weeks ago and I have fast speeds to web pages and then dial-up speeds. Frustrating. My internet and wifi are fine just the speeds are inconsistent.
Babylon5
NETGEAR Employee Retired
Apr 24, 2015
LJ1221 wrote:
... and I also see that netgear has v1.01.05 ...

Where please? I don't see it in the 'Downloads' area?
LJ1221
Novice
Apr 25, 2015
Go to Netgear support home page
Click icon "Routers, Modems & Gateways"
(1) Routers, Modems & Gateways"
(2) Cable Modems
(3) C3700
Under popular answers scroll down to
"Current Firmware Version for Netgear Cables, Modems & Routers
Polarlaw06
Initiate
Sep 11, 2015
Seriously. Can Netgear not see a pattern here? We're being told to contact Comcast for a firmware update, only to be told by Comcast that they don't push firmware down except for their settings. Come on!

I finally decided to scrap my Netgear modem/router and went with a Motorola. You know what? Bam. Problem solved.

So, thank you Netgear for giving me the runaround. You just lost another customer.
- wil12ken
  Aspirant
  Sep 12, 2015
  Thanks for sharing that the new Modem solved your problem. I may join you shortly and like you it will NOT be a Netgear device.
- Merv23
  Aspirant
  Sep 12, 2015
  Thank you very much for sharing. I am having the exact same issue with my C3700 and Comcast has been no help after talking to multiple reps and having two useless technichans come out that didn't even bother troubleshooting the lines. My speed slowed down greatly after Comcast sent through what they said was an increase in speed they are providing at no additional charge. But the opposite happened. Guessing this is when the firmware was changed.
  I started troubleshooting the modem myself and stumbled upon the difference in the firmware version Netgear lists vs what I have, V2.02.06. After reading all the posts, it makes sense now that this is the problem. I can't believe that we are held hostage with what one company says it should be and the other pushes to the modem. There should be a way for us to download the proper firmware for the modem.
  Glad to hear the issue is not happening with Motorola modems. This is likely to be my next step and will never ever by anything Netgear again.
  - carl321
    Star
    Sep 16, 2015
    I know we can report to the FCC regarding slow speed issues. But is there anyway to take these modem/gateways manufacturers like Netgear to the FCC? At least get them investigated for their lack of support?
    
    Also does anyone know how much I have to pay netgear to get support if I am over the 90 day period?
Rexmonaco
Aspirant
Oct 20, 2015
I called Netgear to try and fix the 5g connection issue. I'm on Charter and I do not have cable, just internet. They wanted to charge me $129.00 to fix a $120 modem that is still under warranty. They want to claim it's a configuration issue.

I'd already read here and elsewhere the bad reviews of the products performance. It's clearly a product issue. When I explained to India that I can buy another brand modem for less money and be done with it, he then said I could pay $39 for 30 minutes.

Is this a scam? What are you not understanding? It's your product that is the problem. Not my configuration of it.

I'm done with Netgear products. I don't like piss poor customer support.

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c3700 connection issue