RM551E - Asking for help about VoLTE

Good day everyone!

May I know a reliable method to enable / disable VoLTE on my RM551E running the latest version?

RM551EGL00AAR01A02M8G_01.001.01.001

Also, how can I query the modem to know if my current connection is indeed using or have an active VoLTE? Thanks!

Check with AT command

AT+QCFG="ims"
AT+CGDCONT?

AT+QCFG=“ims”

returns 0,0 parameter

How about CGDCONT? What specific parameter should I check?

It means that it is not enabled.
Try

AT+QCFG="ims",1,1

If not working

AT+QIMSCFG="ims_enable",1

AT+QCFG="ims",1,1 didn’t work so I tried the second command and this is the response after enabling it:

AT+QIMSCFG="ims_enable"
+QIMSCFG: "ims_enable",1,0,0

OK
For CGDCONT:
AT+CGDCONT?
+CGDCONT: 1,"IPV4V6","SMART5G","0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0",0,0,0,0,,,,,,,,,,"",,,,0
+CGDCONT: 2,"IPV4V6","ims","0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0",0,0,0,0,,,,,,,,,,"",,,,0
+CGDCONT: 3,"IPV4V6","sos","0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0",0,0,0,1,,,,,,,,,,"",,,,0

OK

+QIMSCFG: “ims_enable”,1,0,0
The last 0 means that it is not capable of the VoLTE. The module even do not support voice call by default.