Ubiquiti airOS v5.5.6 (XW) firmware was a critical update released in 2013 for airMAX M-series devices using the newer XW hardware revision. While older, it remains essential for users needing to restore legacy configurations or maintain compatibility with older PtMP (Point-to-MultiPoint) networks. Ubiquiti Community Key Technical Improvements Regulatory Updates:
: Found on older legacy hardware.Attempting to flash XW firmware onto an XM device (or vice versa) will result in a "firmware check failed" error or could potentially brick the unit. 2. Why Use Version 5.5.6? Ubnt Firmware Xw.v5.5.6 Download