Sign up to any of Exetel's no lock-in nbn or Fibre Broadband Internet plans and you can get a free ZTE H268A Modem/Router. The only catch is that should you cancel your service within 6 months, we’ll charge you a $79 modem fee.
Here are the Modem/Router specifications:
https://files.exetel.com.au/modems/ZTE_ZXHN_H268A_Brochure_E…
FYI, I have this modem from when I signed up to Exetel ADSL and using it on my NBN plan currently and the wifi coverage is horrendous. Also, get a lot of dropouts even though LAN connectivity is much more stable so definitely not the ISP issue.