Hi, I am working with a EG21-G module on a custom board and we need to enable the VoLTE.
The module is working fine with the 2G voice calls and also with data connection.
To enable the VoLTE, I used the following commands:
AT+QMBNCFG=“Autosel”,1
AT+QCFG:“volte_disable”,0
AT+QCFG: “ims”,1
(optional AT+CFUN=1,1 to apply the modification, not clear if it is mandatory)
but the read command
AT+QCFG:“ims”
always returns
+QCFG: “ims”,1,0
indicating the the VoLTE is not active.
I also noticed that the module somehow auto created some profiles (2 and 3)
+CGDCONT: 1,“IP”,“web.ho-mobile.it”,“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
+CGDCONT: 3,“IPV4V6”,“SOS”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,1
But never activate them by itself:
+CGPADDR: 1,“<my_ip>”
+CGPADDR: 2,“0.0.0.0,0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”
+CGPADDR: 3,“0.0.0.0,0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”
I tried to manually force the activation of the ims profile, obtaining an IP, but nothing changed for the VoLTE.
I deleted the 2 profiles as test and they are not restore by the module anymore.
Do I miss any additional configuration?
I leave some additional information:
Quectel
EG21
Revision: EG21GGBR07A11M1G
+CREG=0,1
+CEREG: 2,1,“6980”,“0B81F0B”,7
+COPS: 0,0,“ho. ho.”,7 (“ho mobile” italian operator)
AT+QMBNCFG=“LIST”
+QMBNCFG: “List”,1,1,0,“ROW_Generic_3GPP”,…
+QMBNCFG: “List”,0,0,0,“VoLTE-ATT”, …
[…]
Thank you