I want to share my experience installing Openwrt. After two long months, I finally installed the latest version.The first thing you need to do is downgrade the version to https://dl.ubnt.com/firmwares/XW-fw/v6.0.3/XW.v6.0.3-sign.31626.170908.1544.bin Then, using tftpd, install https://downloads.openwrt.org/releases/19.07.10/targets/ar71xx/generic/openwrt-19.07.10-ar71xx-generic-ubnt-bullet-m-xw-squashfs-factory.bin or https://downloads.openwrt.org/releases/25.12.4/targets/ath79/generic/openwrt-25.12.4-ath79-generic-ubnt_bullet-m-xw-squashfs-factory.bin Then update to https://downloads.openwrt.org/releases/25.12.4/targets/ath79/generic/openwrt-25.12.4-ath79-generic-ubnt_bullet-m-xw-squashfs-sysupgrade.bin