Get online support
Hi, Tansiokchoo
All you need to do is set up (configure ) the new modem with your tpg credentials.
You need to plug your computer into any LAN port or wireless connect your computer to the modem.
You can follow the wizard set up to do it.
https://community.tpg.com.au/t5/Broadband-Internet/ADSL2-Setup-Guide/td-p/20237
if you are still encountering technical difficulties, we are definitely happy to help.
Thanks