USSD for Mudi GL-E750

Bpz1970 · February 23, 2022, 11:02pm

I’m trying to check the balance of the data by using the USSD code provided by the operator. Currently the code is *444#. I have been googling in forums about the use of the AT command CUSD. What I have been doing (unsuccessfully, of course) is as follows:

AT+QCFG="nwscanmode",2
Ok
AT+CSCS=“GSM”
Ok
AT+CUSD=1,"*444#",15
Error

By the way, my device is a Mudi GL-E750 with a Quectel EG25-G module. Is this module supporting USSD? Am I doing something wrong with the AT commands?
Thanks in advance for your help!

alzhao · February 24, 2022, 9:58am

I have the guide for EC25. Not sure EG25 fully compatible.

Does the CUSD test command work?

Bpz1970 · February 24, 2022, 11:26am

Yes. The CUSD test command works. When typing it, it gives me a result of (0-2). The read command also works, giving me the actual status (could be 0, 1 or 2).

alzhao · February 25, 2022, 7:31am

So it is supported.

In you AT command, there is one problem about the double quota. Can you check? Other format should be fine.

AT+CSCS="GSM"

Bpz1970 · February 25, 2022, 10:34pm

I tested your suggestion, without quotes:

AT+CSCS=GSM
Error

If I do it with quotes:

AT+CSCS="GSM"
OK

On the other hand, when entering the commands:

AT+CSCS?

+CSCS: "GSM"

OK

AT+CSCS=?

+CSCS: ("IRA","GSM","UCS2")

OK

Could it be that the right syntax for the USSD (AT+CUSD=1,"*444#",15) is different?
It’s worth to note that prior to the CUSD command, I enter AT+QCFG="nwscanmode",2 in order to bring the module to 3G (in many cases the USSD queries don’t work with LTE networks).

Thanks in advance for your help!

alzhao · February 26, 2022, 4:13am

I tested on mine using EP06-E.

I only used the following AT command without trying others.

AT+CUSD=1,"*121#",15

I received text message about my data usage.

Can you check if your string is correct?

alzhao · February 26, 2022, 4:40am

BTW, I am using XE300 with Firmware 4.x. I am testing on E750 3.211.

Bpz1970 · February 26, 2022, 11:24pm

I have used the same AT command (with the USSD code changed for my operator) you used, and I just received the OK but no further information for my request.
I have tried also by changing to 2G and 3G, but without any different result. I have also tried with different command sequences, such as:

AT+CSCS="GSM"
Ok
AT+CUSD=1
Ok
AT+CUSD=1,"*444#",15
Ok

And after more than 120s waiting, without receiving the balance I requested, I proceeded to end the USSD session by entering:

AT+CUSD=2
Ok

I’m having the latest firmware on the E750, 3.211.
How could I check for the EG25-G firmware version?
The modem is EG25GGBR07A08M2G, according to he information provided by the Admin Panel.

Bpz1970 · February 27, 2022, 11:55pm

From the AT command AT+CLAC, which lists all the available commands supported by the module, I can’t find the +CUSD command in the list. It might be that the module does not support USSD (See attached image; quite strange due to the fact that when entering AT+CUSD? and AT+CUSD=? we get valid outputs). What we get from AT+CLAC is:

&C
&D
&E
&F
&S
&V
&W
E
I
L
M
Q
V
X
Z
T
P
\Q
\S
\V
%V
D
A
H
O
S0
S2
S3
S4
S5
S6
S7
S8
S9
S10
S11
S30
S103
S104
+FCLASS
+ICF
+IFC
+IPR
+GMI
+GMM
+GMR
+GCAP
+GSN
+DR
+DS
+CMEE
+WS46
+PACSP
+CFUN
+CLCC
+CBST
+CRLP
+CV120
+CHSN
+CSSN
+CREG
+CGREG
+CEREG
+CSCS
+CSTA
+CR
+CEER
+CRC
+CGDCONT
+CGDSCONT
+CGTFT
+CGEQREQ
+CGEQMIN
+CGEQOS
+CGCONTRDP
+CGSCONTRDP
+CGTFTRDP
+CGEQOSRDP
+CGQREQ
+CGQMIN
+CGEREP
+CGPADDR
+CGDATA
+CGCLASS
+CGPIAF
+CGSMS
+CSMS
+CMGF
+CSAS
+CRES
+CSCA
+CSMP
+CSDH
+CSCB
+ES
+ESA
+CMOD
+CEMODE
+CVHU
+CECALL
+QCGEQMIN
+QCGEQOS
+QCGEQREQ
+QCGQMIN
+QCGQREQ
+QCGTFT
+CFUN
$QCPWRDN
+CMUX
+IPR
+QNAND
+QWSERVER
+QWTOCLIEN
+QWTOCLI
+QWPARAM
+QDATAFWD
+QFTCMD
+QBTPWR
+QBTLEADDR
+QBTNAME
+QBTGATREG
+QBTGATSS
+QBTGATSC
+QBTGATSD
+QBTGATSIND
+QBTGATSNOD
+QBTGATRRSP
+QBTGATWRSP
+QBTGATSENLE
+QBTGATADV
+QBTGATDISC
+QBTGATPER
+QBTGATDBALC
+QBTGATDBDEALC
+QBTGATSA
+QBTGATDA
+QFCT
+QIIC
+QAUDLOOP
+QDAI
+CMUT
+CLVL
+CRSL
+QSIDET
+QAUDMOD
+QEEC
+QMIC
+QRXGAIN
+QAUDRD
+QAUDPLAY
+QAUDSTOP
+QPSND
+QTTS
+QTTSETUP
+QLTONE
+QLDTMF
+QAUDCFG
+QTONEDET
+QWTTS
+QPCMV
+QTXIIR
+QRXIIR
+QPOWD
$MYPOWEROFF
+QSCLK
+QCFG
+QADBKEY
+CBC
+QADC
+QADCTEMP
+QGPSCFG
+QODM
+QFUMO
+QFUMOCFG
+QPRINT
+QSDMOUNT
+QFASTBOOT
+QPSM
+QPSMCFG
+QLINUXCPU
+QVERSION
+QSUBSYSVER
+QTEMPDBG
+QTEMP
+QTEMPDBGLVL
+QDIAGPORT
+QLPMCFG
+QSGMIICFG
+QWWAN
+QLWWANUP
+QLWWANDOWN
+QLWWANSTATUS
+QLWWANURCCFG
+QLWWANCID
+QLPING
+QWIFI
+QWSSID
+QWSSIDHEX
+QWAUTH
+QWMOCH
+QWISO
+QWBCAST
+QWCLICNT
+QWCLIP
+QWCLILST
+QWSTAINFO
+QWCLIRM
+QWSETMAC
+QWRSTD
+QWIFICFG
+QAPRDYIND
+QFOTADL
$QCSIMSTAT
$QCPBMPREF
$CREG
$CCLK
$QCCNMI
*CNTI
$QCCLR
$QCDMR
$QCDNSP
$QCDNSS
$QCTER
$QCSIMAPP
$QCPINSTAT
$QCPDPP
$QCPDPLT
$QCPWRDN
$QCDGEN
$QCPDPCFGE
$QCANTE
$QCRPW
$QCSQ
$CSQ
$QCSYSMODE
$QCCTM
$QCBANDPREF
^PREFMODE
^SYSINFO
^SYSCONFIG
^CARDMODE
^DSCI
$QCVOLT
$QCHWREV
$QCBOOTVER
$ECALL
$QCDEFPROF
$QCMRUE
$QCMRUC
$QCAPNE
$QCPDPIMSCFGE
$QCCLAC
^SPN
$QCRMCALL
$QCDRX
$QCRSRP
$QCRSRQ
$QCACQDBC
$QCATMOD
$QCCOPS
^MODE
$QCSIMT
$QCNSP
$QCRCIND
$QCCSGCOPS
$QCPDPCFGEXT
$QCPRFCRT
$QCPRFMOD


OK

radishman · February 28, 2022, 3:27am

You can try to activate the IMS, run the following AT command, and then restart the router

AT+QCFG="ims",1

Bpz1970 · February 28, 2022, 7:24am

I did it, as you instructed, but the result is the same.

alzhao · February 28, 2022, 10:37am

It has problems. Need to check further. I tried a new router with EP06 and it does not work.

Bpz1970 · February 28, 2022, 11:13pm

So, what would be the next step? Is GL.Inet going to check this issue out?
Thanks (again) for your time and effort.

alzhao · March 1, 2022, 2:27am

I need to figure out the correct command to turn on IMS to receive messages.

Bpz1970 · March 1, 2022, 11:26pm

At the moment the result of the query:

AT+QCFG="ims"
+QCFG: "ims",1,0

OK

Meaning that the value of 1 is persistent (I have rebooted the router after initially setting the value to 1), and VoLTE is disabled.
Additionally, I have been browsing through some documentation from Quectel about the MBNs. Could it be that the MBN file used isn’t allowing the USSD to work properly?
After entering:
AT+QMBNCFG="List"
The result is:

+QMBNCFG: "List",0,1,1,"ROW_Generic_3GPP",0x0501081F,201901141
+QMBNCFG: "List",1,0,0,"VoLTE-ATT",0x0501033C,201909271
+QMBNCFG: "List",2,0,0,"hVoLTE-Verizon",0x05010141,201911251
+QMBNCFG: "List",3,0,0,"Sprint-VoLTE",0x05010205,201908141
+QMBNCFG: "List",4,0,0,"Commercial-TMO_VoLTE",0x05010505,201811231
+QMBNCFG: "List",5,0,0,"Telus-Commercial_VoLTE",0x05800C43,201912031
+QMBNCFG: "List",6,0,0,"Commercial-SBM",0x05011C18,201904021
+QMBNCFG: "List",7,0,0,"Commercial-DT",0x05011F1C,201905311
+QMBNCFG: "List",8,0,0,"Reliance_OpnMkt",0x05011B38,201910161
+QMBNCFG: "List",9,0,0,"TF_Germany_VoLTE",0x05010C1B,201909201
+QMBNCFG: "List",10,0,0,"TF_Spain_VoLTE",0x05010CFA,201909261
+QMBNCFG: "List",11,0,0,"Volte_OpenMkt-Commercial-CMCC",0x05012071,201904281
+QMBNCFG: "List",12,0,0,"OpenMkt-Commercial-CT",0x05011322,201911081
+QMBNCFG: "List",13,0,0,"OpenMkt-Commercial-CU",0x05011505,201807052

OK

Meaning that the MBN file used at the moment is the "ROW_Generic_3GPP". Could this be the issue? I don’t want to mess with the MBN files due to the fact that if I screw it up I might be without internet. What could happen if I choose a different MBN file from the list?
Thanks in advance for your help!

radishman · March 2, 2022, 12:14pm

I have no good solution at the moment, and I am communicating with FAE of Quectel

Bpz1970 · March 2, 2022, 1:03pm

Thanks for the news. I’ll be waiting for the answer.

alzhao · March 5, 2022, 5:15am

I tested different modems and seems that this is related to modem’s firmware version (not router firmware version).

Can you receive and send SMS on the router normally?

Bpz1970 · March 5, 2022, 6:20pm

Hello Alzhao. I can successfully receive SMS but, unfortunately, I can’t send any SMS. I have been trying to use some AT commands to do it without any good result

alzhao · March 8, 2022, 9:03am

I

I have the same problem after mess up with AT command. Will try more and understand what is the reason.