For Wireless Internet Service Providers (WISPs), airMAX (NanoStation, LiteBeam, PowerBeam) is the standard. These run airOS.
Before downloading, you must know the exact model.
This guide covers steps to find, download, verify, and prepare Ubiquiti device firmware for common product lines (UniFi OS/Network, UniFi Protect, EdgeMAX/EdgeRouter, airMAX, AmpliFi). Assume you have administrative access to the device or controller and a computer on the same network.
If your device is stuck with a solid blue or flashing white light, you need TFTP.