after firmware upgrade, the cellular connection (inserted one SIM card) stopped to work. SIM card state changing from Inserted to Not inserted repeatedly.
It is brand new router. When I downgraded firmware to RUTM_R_00.07.12.3, it started to work.
I tried reset config already, but without success.
Just to clarify, when downgraded to previous firmware version 7.12.3, the settings were automatically reset.
Could you confirm whether the device was hard or soft rebooted after upgrading to firmware 7.13.1? Additionally, could you try replicating the described behavior and provide screenshots from the Status → System and Status → Network pages?
Please ensure that any private or sensitive information (public IP, S/N, MAC, etc.) is hidden before sharing the screenshots.
Yes, after downgrade, config was reset.
I tried reset config after upgrade to the latest version too.
Also I tried reboot router by webUI and disconnecting the power supply too.
There is no diferrence, when I set mobile connection to 4G only.
To investigate your issue more effectively, I have sent a form to your email address (the one used for forum registration). Please complete the form using 12788 as the ticket ID. Once submitted, we will contact you privately to assist you further.
I’m having the same issue. Brand new RUTM51, have tried firmware 7.13.6, 7.13.4, 7.12.3. All of them I get “SIM Not Inserted” with the 3G/4G/5G lights all flashing in unison. No detection in SIM Slot 2 either. I am currently downgrading to 7.10.2 to test as well. SIM is known working, as we just pulled it out of a Nighthawk M2 that it’s been in for the last 4 years.
EDIT: Confirmed not working with 7.10.2 either. Have also swapped my mobile SIM in, and it doesn’t work. The SIM in the router works in my phone. So definitely a router configuration or fault.
For this matter, to troubleshoot your issue more in depth, we’ll need to reach out to you privately. A support form has been sent to your email address (the one used to register on the forum). Please complete the form using 12788-2 as the ticket ID. Once submitted, we’ll contact you directly via email to assist you further and investigate the issue more effectively.