Can I use my local mobile phone card in Australia to call and send short messages to users of China Mobile or China Unicom? How to charge?

If your mobile phone card has enabled the international roaming function, you can make phone calls or send short messages with China Mobile or China Unicom. The fee must be dialed back to the local inquiry. If you use a mobile card to call the domestic area from Australia, you can use the "** 139" service and charge according to the roaming place, which is the most economical.