modem huawei e3272s-506 hilink + dd-wrt/openwrt + tl-mr3020

modem dd-wrt

http://www.dd-wrt.com/phpBB2/viewtopic.php?t=275894&sid=49c9c7af95bfa4fedac19b4abf43f043

http://www.dd-wrt.com/phpBB2/viewtopic.php?p=978648

http://www.dd-wrt.com/phpBB2/viewtopic.php?p=765263

https://www.dd-wrt.com/wiki/index.php/3G_/_3.5G

http://www.dd-wrt.com/wiki/index.php/Cellular_Phone/USB_Modem_as_WAN_connection

https://forum.openwrt.org/viewtopic.php?id=55691