Default Management IP addr is 192.168.1.1, username: root , no password
Please setup the login password as soon as possible once you logined.
Once you flashed the firmware into SD card, you may simply use "Upgrade" function
in LuCI (no need to decompress the .gz archive) if you want to update it.
Support USB LTE Hilink Dongle and USB Tethering.
Can keeping configurations in upgrade is suggested, it's totally unnecessary to drop them.