Yes, but only via TFTP or the Web UI (if downgrade is allowed). Some later 1.2.x and 1.3.x versions prevent downgrading to very old builds for security reasons.
If your device is stuck in a boot loop or you can’t access the UI:
Previous versions (1.2.0 – 1.2.4) suffered from false radar detection, causing devices to drop off the 5GHz spectrum unnecessarily. Version 1.255 introduces a recalibrated DFS sensitivity threshold, meaning fewer interruptions if you live near an airport or weather radar station. Upgrade Firmware Version 1.255 Ubnt -FREE- Download
Cause: Version 1.255 disables certain frequencies that conflict with new DFS rules (e.g., channel 165).
Solution: Manually set the channel to 149, 153, 157, 161, or enable "Auto" and let the device scan for a legal frequency.
Here is the most critical part of the article. Many third-party websites claim to offer "UBNT Firmware 1.255", but they often bundle malware, spyware, or corrupted images that can brick your device. Yes, but only via TFTP or the Web
You must download the firmware exclusively from Ubiquiti’s official distribution network.
Once you’ve completed the Upgrade Firmware Version 1.255 Ubnt -FREE- Download process, extract maximum performance with these tweaks: Previous versions (1
How to check: Log into your device’s web UI (default IP: 192.168.1.20). Look at the top-right corner. If your current version is v8.x.x, you are eligible.