Mobile reception for NBN Smart Modem

[Gnads1]

Just installed a Telstra Smart Modem for the NBN changeover. It needs 4G reception for the mobile backup provision. I have poor 4G reception (1 bar) inside my home. Reception is ok outside. I'm 3klm from the CBD exchange as the crow flies. Is there any way I can boost the 4G reception inside my house for this new modem?

[Yastiandrie]

Some people have had success connecting external 4G antenna's to the antenna ports on the Smart Modem. Note though that doing this isn't supported by Telstra

If yo do go down this route, it would be best to manually adjust the Antenna selection to 'External' via http://192.168.0.1 > Advanced > Mobile