How to enable USSD in LTE

+QCFG: “ims/ut”,1,1,0

How to enable USSD in LTE,to set “ims/ut” = 1,1,1


Instructions can only be set AT+QCFG=“ims/ut”,(0,1)

Makes sense. In that case, the read syntax likely indicates whether the network/provider has UMTS over LTE available when AT+QCFG="ims/ut",1 is set.

I do not recall any reports of USSD over LTE being enabled, anywhere.

yes, I also can’t find the Instructions to set USSD over LTE available

It can not be made available if the current mobile network does not support it.

Have you got IMS available? What does AT+CGDCONT? return?

+CGDCONT: 1,“IPV4V6”,“”,“”,0,0,0,0

You don’t have an APN set for context 1, so I’m assuming you don’t have a data connection.

With very few exceptions, providers use context 2 for IMS, with an APN of “ims”. You can set that with:


Set and return OK,but AT+CGDCONT? No changes

That’s completely unexpected. I have no idea what’s going on there.

It does look strange. Is there any other way to do it?

What modem are you using?

Is anything working correctly? Data? SMS?

EC20CEFAGR06A14M4G,can telephone call and send SMS on LTE, but cannot send USSD.

And what about EP06-E?