Before attempting an update, verify which version you are currently running:
After updating your firmware:
Because updates are typically pushed over-the-air (OTA), versions vary by provider. Here are the most recent sightings from the community: V1.00(ACBJ.0)b15
For "39link" (Three) specific units, the updates are usually pushed automatically. If your device hasn't updated, you can often trigger it by performing a Factory Reset (holding the reset button for 10 seconds), which forces the router to check the ISP's provisioning server upon reboot. Step 3: Performing the Manual Update
Once released to an ISP, the same .39 build applies to all NR5103E units on that carrier’s firmware track. You cannot flash a different carrier’s .39 without potential configuration mismatches (e.g., Three UK vs. Baltic Networks).