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Semtech (formerly Sierra Wireless) has issued an urgent reminder for customers using AirLink® MG90 devices. If your MG90 firmware is version 4.4.2.0 or older, you must take immediate action to prevent a loss of remote management capabilities through AM/AMM platforms.
Why This Update Matters
A management certificate in MG90 firmware 4.4.2.0 and older is set to expire on September 27, 2025. Once this happens, remote management via AM/AMM will no longer function. This will impact operations, especially for organizations that rely on centralized management of MG90 devices in the field.
If your MG90 firmware is already 4.4.2.1 or higher, you’re safe from this specific certificate issue. However, Semtech still recommends upgrading to the latest release—currently MGOS 4.4.3.1—for best performance, security, and compatibility.
Impact on AM/AMM On-Premises Systems
The certificate expiration doesn’t just affect the devices. Customers running AM/AMM versions earlier than 2.17.4 may also lose device management capabilities. If your system requires an upgrade, it’s best to update AM/AMM to version 2.17.5 or later before upgrading MG90 firmware to ensure uninterrupted compatibility.
Recommended MG90 Firmware Upgrade Path
Semtech advises upgrading all affected devices directly to MGOS 4.4.3.1, following the appropriate upgrade path depending on your current firmware and method (OTA or USB).
The upgrade path charts (shown above) outline the specific sequence you must follow based on your MG90 firmware version. Skipping steps can result in upgrade failures or network connection issues.
Note:
If upgrading from MGOS 4.4.0 or 4.4.1, confirm that the EM9190 5G modules have the correct carrier-specific firmware before upgrading. Incorrect firmware can block network connectivity. Refer to the MGOS 4.4.3.1 Software Release Notes for details or contact Semtech support.
OTA Upgrade Reliability Tip
When performing over-the-air (OTA) updates, Semtech recommends increasing the Download Timeout to 7200 seconds. You can adjust this under: General > Auto Software Updates in the device interface, or apply the setting through a template.
How to Check and Update Your MG90 Firmware
- Log into your MG90 via the web interface.
- Check your current MGOS version under Status.
- If running 4.4.2.0 or older, follow the upgrade path to reach 4.4.3.1.
- Update AM/AMM to 2.17.5 or higher if necessary.
- Adjust OTA download timeout to ensure smooth upgrades.
Final Takeaway
Organizations running older MG90 firmware must act now to avoid losing remote management after September 27, 2025. By upgrading to MGOS 4.4.3.1 and ensuring AM/AMM is up to date, you’ll maintain reliable, secure, and fully functional device management.
Don’t wait, update your MG90 firmware today to stay ahead of the deadline!
