EC25-EUX VOLTE support

soo_kim · July 27, 2022, 1:41pm

Quectel
EC25
Revision: EC25EUXGAR08A08M1G

+QMBNCFG: “List”,0,0,0,“ROW_Generic_3GPP”,0x0501081F,202101071
+QMBNCFG: “List”,1,0,0,“TW_Mobile_China_VoLTE”,0x0580FB81,202104162
+QMBNCFG: “List”,2,0,0,“Bouygues_France_VoLTE”,0x05800101,201905211
+QMBNCFG: “List”,3,0,0,“Telstra-Commercial_VoLTE”,0x0580079E,202105192
+QMBNCFG: “List”,4,0,0,“Reliance_OpnMkt”,0x05011B38,202003251
+QMBNCFG: “List”,5,0,0,“Commercial-Smartfren”,0x0501250A,202012291
+QMBNCFG: “List”,6,0,0,“VF_Germany_VoLTE”,0x0502041C,202106231
+QMBNCFG: “List”,7,0,0,“Commercial-DT”,0x05011F1C,202106171
+QMBNCFG: “List”,8,0,0,“STC_Saudi_VoLTE”,0x0501FE01,201912231
+QMBNCFG: “List”,9,0,0,“TF_Spain_VoLTE”,0x05010CFA,202106171

OK

+QCFG: “ims”,1,0

this is not support volte?

does this module support LGU+ ?
why can not enable volte?

Robson · July 28, 2022, 7:50am

Hi there I’ve just been having the same problem this is what worked for me

Prepare a SIM card that supports VoLTE functions

AT+QCFG=“ims”,1 //enable IMS (VoLTE)
AT+QMBNCFG=“autosel”,1 //enable auto selection of MBN file based on SIM IMSI
AT+CFUN=1,1 //reboot to take effect

Test VoLTE
AT+COPS? //check if module is in LTE technology (7=VoLTE), else VoLTE can’t be tested, as SIM does not attach in LTE
ATDnnnnnn; //voice call to number nnnnn, can be local or international number
AT+COPS? //check if module is still in LTE technology (7=VoLTE, test passed) or it re-registers to 2G/3G (0/2=no VoLTE, test failed) during the call
ATH //hand up the call
AT+COPS? //check if module returned in LTE technology (7=VoLTE), if previously was 2G/3G duirng the call

soo_kim · July 28, 2022, 9:40am

Thank you for your reply not work for me.
seems need mbn file for this operator

E_Kim · May 12, 2023, 7:12am

안녕하세요 혹시 LG관련해서 진행 하셨나요?
SK KT 와 다르게 VOLTE 방식이라 진행을 하다보니
기존에 EC25-e시리즈에 들어가있는 MBN은
LG U+의 070등 인터넷 전화망인것 같더라구여.
APN부터 달라서 뭔가 수동으로 진행을 해보다
글을 보게 되어 메세지를 남기어봅니다

Eduar_Tua · May 23, 2023, 3:16am

I’ll jump into this thread to share my experience. I’m testing the EC25-G in Mexico and I can’t get it with voLTE enabled, even though all networks in Mexico supports voLTE. Here’s my configuration:

AT+QCFG=“ims”
+QCFG: “ims”,1,0
OK

AT+COPS?
+COPS: 0,0,“AT&T 4G”,7
OK

Not Mexican network on the list. Maybe this is the problem?
AT+QMBNCFG=“List”
+QMBNCFG: “List”,0,1,1,“ROW_Generic_3GPP”,0x0501081F,202108201
+QMBNCFG: “List”,1,0,0,“VoLTE-ATT”,0x0501033C,202105171
+QMBNCFG: “List”,2,0,0,“hVoLTE-Verizon”,0x05010141,202011021
+QMBNCFG: “List”,3,0,0,“Sprint-VoLTE”,0x05010205,202010201
+QMBNCFG: “List”,4,0,0,“Commercial-TMO_VoLTE”,0x05010505,202106241
+QMBNCFG: “List”,5,0,0,“Telus-Commercial_DO”,0x0580F601,202105061
+QMBNCFG: “List”,6,0,0,“Commercial-SBM”,0x05011C18,202004211
+QMBNCFG: “List”,7,0,0,“Commercial-DT”,0x05011F1C,202106171
+QMBNCFG: “List”,8,0,0,“Reliance_OpnMkt”,0x05011B38,202003251
+QMBNCFG: “List”,9,0,0,“TF_Germany_VoLTE”,0x05010C1B,202004151
+QMBNCFG: “List”,10,0,0,“TF_Spain_VoLTE”,0x05010CFA,202106171
+QMBNCFG: “List”,11,0,0,“Volte_OpenMkt-Commercial-CMCC”,0x05012071,202102221
+QMBNCFG: “List”,12,0,0,“VoLTE_OPNMKT_CT”,0x050113FC,202105131
+QMBNCFG: “List”,13,0,0,“CU-VoLTE”,0x05011508,202109101
+QMBNCFG: “List”,14,0,0,“Telstra-Commercial_VoLTE”,0x0580079E,202105192
+QMBNCFG: “List”,15,0,0,“Commercial-KDDI”,0x0501071D,202011192
+QMBNCFG: “List”,16,0,0,“Commercial-DCM”,0x05010D17,202104121
+QMBNCFG: “List”,17,0,0,“Commercial-SKT”,0x05012715,202103121
+QMBNCFG: “List”,18,0,0,“Commercial-KT”,0x05012C0D,202108241
+QMBNCFG: “List”,19,0,0,“Commercial-LGU”,0x05012626,202108241
+QMBNCFG: “List”,20,0,0,“Commercial-USCC”,0x0504FC40,202011111
+QMBNCFG: “List”,21,0,0,“Optus-Commercial_VoLTE”,0x05800CA2,201910241
+QMBNCFG: “List”,22,0,0,“STC_Saudi_VoLTE”,0x0501FE01,201912231
+QMBNCFG: “List”,23,0,0,“Commercial-Rogers”,0x05018821,202108021

OK

AT+QMBNCFG=“AutoSel”
+QMBNCFG: “AutoSel”,1

During the call:

AT+COPS?
+COPS: 0,0,“AT&T”,2

See that number 2 means VoLTE is disabled or not voLTE session at all.

Can anyone from quectel help on ths matter?

Of course the SIM card used supports VoLTE.

snowgum · May 23, 2023, 3:36am

The “2” in that result means you’re currently on 3G/UMTS/WCDMA, and not on 4G/LTE.

Eduar_Tua · May 23, 2023, 4:22am

That’s right. But if I check when no call is in progress I get:
AT+COPS?
+COPS: 0,0,“AT&T 4G”,7
OK

I know that for some reason the module is switching into 3G/UMTS/WCDMA, and I need to keep it in 4G/LTE.

snowgum · May 23, 2023, 6:02am

AT+QCFG="nwscanmode",3

should do that, but it won’t get you VoLTE if it’s otherwise dropping back to 3G for all voice calls.

What do these AT commands return?

AT+CGDCONT?
AT$QCPDPIMSCFGE?

Have you tried manually selecting this MBN file, and turning off MBN AutoSel?

AT+QMBNCFG="Select","VoLTE-ATT"

Eduar_Tua · May 23, 2023, 3:37pm

Thanks @snowgum here are the commands:

AT+QCFG="nwscanmode"
+QCFG: "nwscanmode",0

OK

AT+QCFG="nwscanmode",3

OK

AT+CGDCONT?
+CGDCONT: 1,"IPV4V6","","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
+CGDCONT: 3,"IPV4V6","SOS","0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0",0,0,0,1

OK

AT$QCPDPIMSCFGE?
$QCPDPIMSCFGE: 1 , 0 , 0 , 0
$QCPDPIMSCFGE: 2 , 1 , 0 , 0
$QCPDPIMSCFGE: 3 , 1 , 0 , 0


OK

Eduar_Tua · May 23, 2023, 5:18pm

After setting

AT+QCFG="nwscanmode",3

It lost the configuration for

"urc/ri/ring"
"urc/ri/smsincoming"

And incoming call are canceled automatically.

snowgum · May 23, 2023, 9:27pm

I was hoping that one of those two results were different from that, meaning that the fix might be easy.

Instead, they’re as they should be for IMS.

I’d say that’s a result of VoLTE failing.

Please try selecting and using the VoLTE-ATT MBN file if you haven’t already.

Eduar_Tua · May 23, 2023, 10:37pm

I suspect that MBN file is for ATT USA, which might no be the same in Mexico. I tried anyways.

AT+QMBNCFG="List"
+QMBNCFG: "List",0,0,0,"ROW_Generic_3GPP",0x0501081F,202112292
+QMBNCFG: "List",1,1,1,"VoLTE-ATT",0x0501033C,202203251
+QMBNCFG: "List",2,0,0,"hVoLTE-Verizon",0x05010141,202111151
+QMBNCFG: "List",3,0,0,"Sprint-VoLTE",0x05010205,202010201
+QMBNCFG: "List",4,0,0,"Commercial-TMO_VoLTE",0x05010505,202202211
+QMBNCFG: "List",5,0,0,"Telus-Commercial_DO",0x0580F601,202105061
+QMBNCFG: "List",6,0,0,"Commercial-SBM",0x05011C18,202004211
+QMBNCFG: "List",7,0,0,"Commercial-DT",0x05011F1C,202201041
+QMBNCFG: "List",8,0,0,"Reliance_OpnMkt",0x05011B38,202003251
+QMBNCFG: "List",9,0,0,"TF_Germany_VoLTE",0x05010C1B,202004151
+QMBNCFG: "List",10,0,0,"TF_Spain_VoLTE",0x05010CFA,202203241
+QMBNCFG: "List",11,0,0,"Volte_OpenMkt-Commercial-CMCC",0x05012071,202201063
+QMBNCFG: "List",12,0,0,"VoLTE_OPNMKT_CT",0x050113FC,202201101
+QMBNCFG: "List",13,0,0,"CU-VoLTE",0x05011508,202201063
+QMBNCFG: "List",14,0,0,"Telstra-Commercial_VoLTE",0x0580079E,202204021
+QMBNCFG: "List",15,0,0,"Commercial-KDDI",0x0501071D,202203011
+QMBNCFG: "List",16,0,0,"Commercial-DCM",0x05010D17,202203141
+QMBNCFG: "List",17,0,0,"Commercial-SKT",0x05012715,202202151
+QMBNCFG: "List",18,0,0,"Commercial-KT",0x05012C0D,202108241
+QMBNCFG: "List",19,0,0,"Commercial-LGU",0x05012626,202108241
+QMBNCFG: "List",20,0,0,"Commercial-USCC",0x0504FC40,202203021
+QMBNCFG: "List",21,0,0,"Optus-Commercial_VoLTE",0x05800CA2,201910241
+QMBNCFG: "List",22,0,0,"STC_Saudi_VoLTE",0x0501FE01,201912231
+QMBNCFG: "List",23,0,0,"Commercial-Rogers",0x05018821,202202091

OK

You can see it selected. BUT it doesn’t work for calls:

ATD+52812XXXXX41;
ERROR

Call are sent to the voice inbox.

AT+COPS?
+COPS: 0,0,"AT&T 4G",7

OK

I can send SMSs though.

snowgum · May 23, 2023, 10:53pm

With VoLTE-ATT selected and active, do these two AT commands still return the same results for context 2?

AT+CGDCONT?
AT$QCPDPIMSCFGE?

If they do, I have further ideas at this stage.

Eduar_Tua · May 23, 2023, 11:20pm

AT+CGDCONT?
+CGDCONT: 1,"IPV4V6","","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
+CGDCONT: 3,"IPV4V6","SOS","0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0",0,0,0,1

OK

AT$QCPDPIMSCFGE?
$QCPDPIMSCFGE: 1 , 0 , 0 , 0
$QCPDPIMSCFGE: 2 , 1 , 0 , 0
$QCPDPIMSCFGE: 3 , 1 , 0 , 0


OK

BTW in which documentation I can find AT$QCPDPIMSCFGE? I don’t see it on the AT commands manual.

Eduar_Tua · May 24, 2023, 1:09am

I just opened a new thread here.

snowgum · May 24, 2023, 2:49am

As with other commands beginning “AT$QC”, it’s a command relevant to the Qualcomm chips used in most (but not all) Quectel modems.

I first encountered it reading the Sierra Wireless discussion forum.

The only place I’ve seen it documented is in the Telit LN940 SERIES AT Command User Guide.

Eduar_Tua · May 25, 2023, 4:06pm

Thank you so much. It is good to see that there are people with a ton of knowledge on the field helping on the forum.