Hi @dorisng14 ,
Here is a community article that can of help to you.
Troubleshooting issues with Incoming/Outgoing Calls on TPG Mobile
If the issue persists, our mobile tech team can be reached at 13 14 23 or you can PM to us your TPG mobile number including your preferred callback number, time/date and we'll arrange a callback to assist you on this matter.
How do I private message (PM) in the community
Just checking this thread, in the event that you still require assistance please post an update on this thread.
I am using iPhone xs Max, why I can receive voice calls but unable to make voice calls. please advise is there any restriction of making voice calls from TPG sim card?
Please send me a Private message with your account details (Customer ID/Mobile number) also include your best contact number and preferred time tomorrow.
Please arrange a Technician to call me back, those links that privated by are Access Denied. My TPG number xxxxxx, can call me tomorrow evening 6pm.