BYO Asus DSL-AC68U Modem with Slow wifi download speeds fix
Just and update that, if you are on Telsta or Belong NBN plans, and using some older PCs connected via Wifi (2.4Ghz) you may still experience extremely slow download speeds. Although there are claims that this issue may have been fixed in the subsequent firmware upgrades. But I have the latest firmware insalled on the modem and still experienced this old issue and the same old solution fixed the problem i.e. to enable 802.1Q in WAN settings and restart your modem.
Still not sure how to do it? Have a look at the screenshots below: