Older versions sometimes handle Dynamic Frequency Selection (DFS) differently, which may be necessary for specific regional deployments.

Certain mesh firmware or legacy monitoring tools require older airOS versions to function.

Firmware 5.6.4 Download request [Solved] - Ubiquiti Community

Released in mid-2013, version 5.5.6 introduced several regulatory updates and stability fixes designed to improve point-to-multipoint (PtMP) performance.

Fixed a recurring issue where Access Points (APs) would stop passing traffic in certain PtMP setups.

Select the .bin file and click Upload . Once verified, click Update and wait for the device to reboot. Do not power off the device during this process. Why Downgrade to XW.v5.5.6?

While newer versions like v6.3.24 offer better security, some users prefer v5.5.6 for:

In the System tab, click Choose File under the "Upload Firmware" section.