No need TPG will provide the modem/router to be used to for the service.
For more details about TPG home broadband you may check this link.
Do you need a router or a switch to connect other systems when using 4g wireless service
Hi cbdindustries, you have to use the TPG supplied modem for the SIM to work.
You can try relocating the modem and see if it can get a better reception. Otherwise, please send us a private message along with your customer ID so we can have a closer look at your connection.