I did find that I had to also purchase the Telstra smart wifi boosters to get good coverage around the house. The house is a single story L shaped house with the modem in one end of that L. The NBN speeds are very poor but that is Telstra, not the modem. As for being able to switch over to mobile data when NBN is not available.

Telstra Smart Modem in minutes. Get a more reliable home internet connection with the Telstra Smart Modem™ Gen 2. It switches from our home internet network to our mobile network if needed, all while still using your home data allowance. 4G coverage needed. Mobile speeds are limited to 6/1 Mbps and will vary. I know this is an older thread, but there is no official manual for the Modem with the Telstra Firmware. There is really not a lot you can do with it other than what is in the UI, which is pretty self explanatory anyway. Telstra can give you the specs, but there are also many entries in Google that give it also. Apr 12, 2018 · If you have an nbn™ Fibre to the Premises, nbn™ Fixed Wireless or Telstra Velocity internet connection, this video will show you how to set up your new Telstra Smart Modem™. nbn™ and other ...