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Forum Discussion
Dkdman
Apr 06, 2025Tutor
Netgear CM1100 firmware update help
I have a netgear CM1100 modem. My internet provider, Sparklight, does NOT update my modem, how do I update the firmware since they do not. Sparklight ONLY updates equipment that a customer rents from them. I purchased this modem because the modem/router I rented from them (Sparklight) at first was a piece of junk and I had continual problems with it. The Sparklight tech that responded (several times) to my house to fix the issues in the past told me to buy my own modem/router because he agreed that the rented equipment was junk.
As far as I know it has the orignial firmware? Operating system would be Windows 11/ Ubuntu linux. It would be in a home office setting. So video conferencing is important.
Please help
Side note: It asked me what board to join, none of the board listed had anything to do with modems, except the one I "joined". This board listed mobile modems? When I went to "show all" it listed languages so select, not boards to select? This is the closest board I could join, because at least it mentioned modems? I did not know which other board I could join?
9 Replies
- DkdmanTutor
For an update, I just had me ISP out at my house because I upgraded my internet to 1 gig. The repair guy from my ISP showed me how I can check the firmware on my MODEM! The repair guy from my ISP told me that THEY CAN'T update my modem firmware unless I am renting my modem from them. I am not renting from my ISP, I own all my own equipment. The login for the modem is located on the bottom of the Modem itself. I logged in and updated my password and checked the firmware. All IS up to date!!
- FURRYe38Guru - Experienced User
It's up to the ISP to Update any connected modem to there network. Some ISP may not update user owned modems. Up to the ISP.
I'm surprised that Sparklight won't on yours unless they may deem it older generation. They can update user owned modems. Unless they have changed there policy. I had my CM1100 online with Sparklight and was seeing over 900Mpbs on there 1Gb plan. I haven't used the CM1100 in years. CM3000 is currently online with Sparklight.What FW version is on your CM modem currently?
- DkdmanTutor
The issue I am trying to figure out is I have 1 gig though my service provider and I am only getting 500-750, through a wired connection. I had my ISP come out and check everything but they said it was all good. They will NOT do anything with my router or my modem because I don't rent the equipment from them. I checked the firmware on my router and it is up to date. My router is a TP Link AC4000 (wifi 5), so I wanted to check my modem firmware, thus the reason for this thread.
- DkdmanTutor
I think I figured it out, why the slower speeds when wired. I turned off the firewall, malware and antivirus security features built into the router. After doing that, I was up to 910 to 930.
On a side note, I still feel that I should be able to update the firmware on my modem, just like I can update it on my router! Since my ISP won't update my modem firmware because I don't rent it from them!!
I appreciate everyones help....
- plemansGuru - Experienced User
Dkdman wrote:
On a side note, I still feel that I should be able to update the firmware on my modem, just like I can update it on my router! Since my ISP won't update my modem firmware because I don't rent it from them!!
I appreciate everyones help....
I think we all think that but its part of the docsis spec. Half the reason is that if users could change firmware, they could change their speed tier as that's set with the modem provisioning.
Its one of the reasons you'll rarely see forum members recommend the modem/router combo devices as their firmware is locked too. (except the CAX series, the router side can be upgraded but not the modem side.
This not being able to update modems is true for all brands.
- plemansGuru - Experienced User
You don't. Firmware isn't user updatable. Its part of the provisioning from the ISP.
So there isn't anything you can change with it. Its part of the docsis spec.
Are you having issues with it?