Network Issues

Hey guys new here
So I have had an MX4 Pro for a little bit now and ivé always had this problem. I live in Australia and am with Telstra, I get good enough reception and can use my data and text but can never make or receive calls.
Any ideas on what the problem may be?

Admin

Verify the APN settings, also try to reboot.
Did this issue appeared in previous firmwares too?

Looks like your connection to Meizufans was lost, please wait while we try to reconnect.