Hi @Davidlam,
Welcome to the community!
Here are some articles that you may find helpful, this will guide you a basic troubleshooting about Mobile Data Issues.
No Mobile Network Coverage?
What to do - TPG Mobile Data Not Working – Android
What to do - TPG Mobile Data Not Working – iPhone
Let us know how it will go.
In the event that issue still persists after the troubleshooting, send us a Private Message with your account details (Username/Customer ID together with the address on file).
How do I private message (PM) in the community
Regards,
My case no 4g
