MR1100 suddenly cannot connect to cell service

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navibean9 wrote:

"Help!"   I have an (out.of.warranty) MR1100.   It worked fine for about a year - and then suddenly stopped yesterday. 

The error message on boot-up says:  "Mobile Broadband Disconnected - Your data connection is disconnected." hpinstantink

I have AT&T cell service.     Here's what I've tried - all with no luck so far:

* New SIM card:    My carrier Consumer Cellular (reseller of AT&T service)  suggested a new SIM card.  I replaced the SIM;  They updated their records to point to the new SIM card.   No luck.

* Reset & re-booted:   I did a reset w- the button inside the device.   And I launched the AttWifiManager page, and I reset to factory settings. 

I re-booted after each change. 

* Possibly noteworthy-   I am testing this at my home:  I'm in a US suburban metro area with decent AT&T coverage.  But it's (only) decent enough for good voice service, most of the time.  So I typically only see 3 bars of signal strength. 

* After all these fix attempts, the error message is the same:  (That line above.)

THANK YOU in advance for any suggestions you can offer! 

- Navibean9

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Hello,

Can you please tell me is your query is solved or not because i am also facing the similar issue so if you got any answer or solution please share it.

Best regards,
florence023

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navibean9 wrote:

"Help!"   I have an (out.of.warranty) MR1100.   It worked fine for about a year - and then suddenly stopped yesterday. 

The error message on boot-up says:  "Mobile Broadband Disconnected - Your data connection is disconnected." hpinstantink

I have AT&T cell service.     Here's what I've tried - all with no luck so far:

* New SIM card:    My carrier Consumer Cellular (reseller of AT&T service)  suggested a new SIM card.  I replaced the SIM;  They updated their records to point to the new SIM card.   No luck.

* Reset & re-booted:   I did a reset w- the button inside the device.   And I launched the AttWifiManager page, and I reset to factory settings. 

I re-booted after each change. 

* Possibly noteworthy-   I am testing this at my home:  I'm in a US suburban metro area with decent AT&T coverage.  But it's (only) decent enough for good voice service, most of the time.  So I typically only see 3 bars of signal strength. 

* After all these fix attempts, the error message is the same:  (That line above.)

THANK YOU in advance for any suggestions you can offer! 

- Navibean9

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Hello I am also facing the same problem, it's very frustrating for me 

Username/Password: Leave blank

Save and reboot.

Force LTE Only Mode:

In the same web UI, try forcing the device to use LTE only, not auto or 3G fallback, just to see if it locks onto a stable signal.

Firmware Check:

If possible, check if the firmware is up to date under Settings > About > Software Version. Some firmware versions have bugs that can cause loss of mobile connectivity. If you're unsure, Netgear support or community might help match your version.

Try SIM in a Phone:

Just to be 100% sure the new SIM is provisioned correctly, try putting it into a regular phone and confirm that mobile data works — not just voice/text. Then reinsert into the MR1100.

Signal Booster Test (Optional):

Even though 3 bars seem okay, the MR1100 can be more sensitive than phones. If you have access to a location with better signal (or a signal booster/repeater), test there just once to rule out signal thresholds. Instant ink support

🚨 If All Else Fails:

If you’ve tried all this and it still won’t connect, there may be:

A hardware issue (e.g., modem failure or antenna fault — common in older units).

Sorry to hear you're dealing with this — frustrating for sure, especially after trying so many solid troubleshooting steps already. Based on your detailed notes, here’s a breakdown of possibilities and next steps to try for your Netgear Nighthawk MR1100 (on AT&T/Consumer Cellular):

🔍 Let’s review what might be going wrong:

1. SIM/Account Issue
   Even though the SIM is new and provisioned, sometimes APN settings or account provisioning (especially on MVNOs like Consumer Cellular) can cause data connection failures. Adobe customer support
2. Signal/Modem Hardware Problem
   Since you're getting 3 bars, it's not a total dead zone — but weak signal can sometimes cause unreliable data connection handshakes. Still, it shouldn't cause total failure unless the modem is failing.
3. Firmware or Device Failure
   Since it worked for a year and then stopped suddenly, firmware corruption or hardware (e.g., modem or radio module) failure is possible.

✅ Suggestions / What to try next:

1. Check and Set APN Manually

Sometimes the default APN settings don’t get updated correctly when switching SIMs, especially on MVNOs like Consumer Cellular.

• Go to http://attwifimanager/ while connected to the MR1100 Wi-Fi
• Navigate to Settings > Network Settings > APN
• Create a New APN manually:

For Consumer Cellular (AT&T), try:

makefile

CopyEdit

APN: att.mvno

Username: (leave blank)

Password: (leave blank)

Authentication: None

• Set it as default, save, and reboot.

1. Check SIM Status and Modem Info

• On attwifimanager, go to About > Modem Status
• Does it show the IMEI and ICCID correctly?
• What is the Network Status? Does it say "Registered", "Searching", "Disconnected", etc.?

Sorry to hear you're having trouble with your MR1100. Here are a few steps you can try to fix the cellular connection issue:

1. Restart the device – A simple reboot can often resolve temporary network issues.
2. Check SIM card – Make sure the SIM card is properly seated and hasn’t been damaged or deactivated.
3. Network settings reset – Go to the admin panel and try resetting network settings to default.
4. Firmware update – Ensure the MR1100 has the latest firmware installed.
5. Move to a different location – Cellular signal may be weak in your current area.
6. Contact your carrier – There may be a tower outage or an issue with your account/SIM provisioning.

If none of these help, try doing a factory reset (after backing up any settings), or reach out to Netgear support for deeper troubleshooting.

My Netgear Nighthawk MR1100 suddenly can’t connect to cellular service. It was working fine before, but now there’s no signal, and it just shows "No Service" or keeps searching. I’ve already tried rebooting and reseating the SIM card, but no luck.

Has anyone else experienced this? Any tips or fixes would be appreciated.

If you're replying to someone else who said this, here’s a good response you can give:

Sorry to hear your MR1100 lost cell service. Here are a few things you can try:

1. Restart the device – You’ve probably already done this, but sometimes a full power cycle helps.
2. Check SIM card – Make sure it’s seated properly and not damaged. Try the SIM in another device if possible.
3. Check APN settings – Go into the MR1100’s settings and ensure the Access Point Name (APN) matches your carrier’s.
4. Check for firmware updates – Sometimes an outdated firmware can cause connectivity issues.
5. Manual band selection – Log into the admin panel and try selecting a specific LTE band that your carrier supports.
6. Test location – It might be a local tower issue. Try a different location if you can.

If none of that works, your device might be blacklisted, have a hardware issue, or there could be a carrier-side block or provisioning problem. Try contacting your mobile carrier for help as well.

Let me know what you've tried, and I can help further!

Help! MR1100 Suddenly Stopped Working – 'Mobile Broadband Disconnected'"

Hi all – hoping someone can help!

I have a Netgear Nighthawk MR1100 (out of warranty), which worked fine for about a year. But suddenly, as of yesterday, it stopped connecting.

Error message on boot-up:

"Mobile Broadband Disconnected – Your data connection is disconnected."

My Setup:

• Carrier: Consumer Cellular (an AT&T network reseller)
• Location: US suburban metro area with decent AT&T coverage (usually 3 bars)

Here's What I've Tried (No Success Yet):

• New SIM Card:
  Consumer Cellular sent me a replacement SIM and updated their system. Inserted the new SIM — still the same error.
• Reset & Reboot:
  Used the reset button inside the MR1100. Also performed a full factory reset via the attwifimanager page. Rebooted after each change. No improvement.

Other Notes:

• Voice service works fine in this area, but mobile data is typically average — usually 3 bars.
• After all attempts, the same error persists.

If anyone has suggestions or ideas, I’d greatly appreciate it!

Thanks!
— Navibean9