BG96 -VoLTE on CAT.M1

Here’s the FW (BG96MAR03A02M1GA) and the configuration file (ROW_Commercial,0x05010802,201910231) that is to be loaded in as a 2nd step,  then finally the VoLTE should be enabled.
https://cnquectel-my.sharepoint.com/:f:/g/personal/europe-fae_quectel_com/EppYnpJVtTZOvqt6JV0lqwMBJBvarqyUOH2x2ccpiUd4NQ?e=olyp1c

Also there are 2 instruction files, Quectel_BG96_MBN_Application_Note_V1.0 this will give overall process for the MBN configuration file upgrade. 
See section 4 for example to delete the existing mbn file ROW_Commercial, upload the new one, then activate it.
The How+to+add+MBN+by+command.pdf shows you better step by step how to use QCom terminal tool to do the upload. For Telstra CAT.M1, load the Telstra MBN file.
Evenutally you should get something like

AT+QMBNCFG=”List”
+QMBNCFG: “List”,0,1,1,”ROW_Commercial”,0x05010800,201801051   //the x,1,1 indicates mbn is activated.
AT+QMBNCFG=”Autosel”,1

//now completely power off and on.  After attach:
AT+CGDCONT?
/* My example response, should show more than one line as below:
[2020-05-18_10:44:26:039]+CGDCONT: 1,”IPV4V6″,”,<yourAPN>”,”0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0″,0,0,0,0
[2020-05-18_10:44:26:064]+CGDCONT: 2,”IPV4V6″,”ims”,”0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0″,0,0,0,0
[2020-05-18_10:44:26:064]+CGDCONT: 3,”IPV4V6″,”SOS”,”0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0″,0,0,0,1
*/

AT+CGPADDR
/*  My response should be something like this:
[2020-05-18_10:44:36:210]+CGPADDR: 1,”10.77.43.218″  – valid IP address
[2020-05-18_10:44:36:210]+CGPADDR: 2,”36.5.220.0.3.219.209.105.161.24.101.25.106.19.47.206″    – valid IP address
[2020-05-18_10:44:36:210]+CGPADDR: 3,”0.0.0.0,0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0″

/* After this my call worked ok:
[2020-05-18_10:44:54:617]atd0433545392;
[2020-05-18_10:45:00:512]OK
[2020-05-18_10:45:06:601]ath
[2020-05-18_10:45:07:720]OK
*/