This article helps you fix the problem when your Nebula device was updated with firmware for a non-Nebula model and can’t connect to Nebula Cloud anymore. It shows how to check if your router is a Nebula or non-Nebula version and explains which firmware you need to install to restore the connection.
Issue
If a Nebula-capable device (e.g., LTE3301-PLUS) is accidentally flashed with “generic” firmware, it will no longer connect to the Nebula Cloud.
Nebula Supported devices:
| Device Name | Product Number |
| Nebula LTE3301-Plus | LTE3301-PLUS-EUZNN1F |
| Nebula NR5101 | NR5101-EUZNN1F |
| Nebula NR7101 | NR7101-EUZNN1F |
Solution
Verify that your device is indeed a supported Nebula model (LTE3301-Plus, NR5101, NR7101).
Download the correct Nebula firmware (for example, LTE3301-Plus — version 1.00 (ACCA.0)C0).
In the web interface, go to Maintenance → Firmware Upgrade, select the firmware file, and click Upload.
After the reboot, the device should display the correct firmware version and be discoverable in Nebula.
If the device still doesn’t appear in Nebula after the update, follow the instructions for adding a mobile router to the NCC.
This article is divided into two sections on how to check your device:
Hardware Variant
Each mobile router model comes with two possible variants:
Nebula Hardware Variant – can add hardware to the NCC organisation.
How to recognize the Nebula hardware variant?
Generic Hardware Variant – cannot add hardware to NCC organization
If you don't have the Indicators mentioned above on the Box / Hardware, the device is not supported to integrate into the Nebula Cloud.
Software Variant
Each mobile router model can upgrade to its generic or nebula firmware version.
There is no possibility to update a non-Nebula device to a Nebula device via firmware update.
Nebula Software Variant – supports NCC discovery.
How to recognize software variants of the mobile Router?
Generic Software Variant – does not support NCC discovery
For generic devices, you see the firmware version in the release notes :

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