For new services, we recommend customers to check first if their service has been installed and activated.
We have created this community article, which contains a video on How to track your TPG service installation
We also send an email notification once the service is activated.
If you have received this email and the service is still not working, we recommend to check if the equipment is properly set up and we have created setup guides for all technologies that TPG use : New Connection Setup Help
In this particular case, your NBN service installation is still in progress if you received the modem/router for NBN Co. we suggest not to use it until the installation is complete and disregard the SMS with the instruction to setup the NBN modem/router.
While waiting for the completion of NBN installation we recommend to connect your ADSL2+ modem/router so you can still use the service for now.