op+3g

https://forum.openwrt.org/viewtopic.php?id=44895

http://eko.one.pl/forum/viewtopic.php?id=10269

http://trac.gateworks.com/wiki/wireless/modem

http://josefsson.org/openwrt/dongle.html

http://www.pcengines.info/forums/?page=post&id=4BDA525E-F68D-4637-A1AC-701AFAD13F9E&fid=18B76B8A-012C-40FD-941A-E1C344245E63

http://forums.whirlpool.net.au/archive/2294185

https://forum.openwrt.org/viewtopic.php?id=44895

ME909u-521: http://consumer.huawei.com/en/solutions/m2m-solutions/products/support/user-guides/me909u-521-en.htm