Welcome to the community,
We did an article that you may find helpful, this will guide you a basic troubleshooting with incoming and outgoing mobile calls.
Troubleshooting issues with Incoming/Outgoing Calls on TPG Mobile
See the link below and let us know how it will go.
Just transferred to TPG from Vodafone. TPG sent email to advise that all ready to go. Put TPG sim into phone which acknowledges that network is now TPG. However, phone beeps 3 times and cannot make or receive calls.
