Welcome to TPG Community!
Is your Android phone currently connected to the 2.4 Ghz WiFi connection or is it connected to the 5 Ghz WiFi connection? If it's currently on the 2.4 Ghz, are you able to connect to the 5 Ghz connection to check if the internet will work.
What are the troubleshooting that you've done so far?
I've checked the modem and it has the latest firmware.
Hi @post, we recommend having a read of this community article, which may help in resolving the issue.
Wi-Fi troubleshooting steps - No Internet/Connection
Should you require further assistance, please PM us your best contact number and most convenient time to receive a call so we can have a Technical Specialist contact you. Thank you.