USSD support for Revision EC25ECGAR06A07M1G

Derich · October 24, 2021, 3:53pm

Does Quectel with revision EC25ECGAR06A07M1G support USSD

witt.wang-Q · October 25, 2021, 1:13am

Hi Derich

Our EC25 support USSD.
I will send a document to your email and in its 11.18 you can learn how to use USSD.

Thanks
witt

Derich · October 25, 2021, 1:58am

Thanks for your replay and also the document you sent to me. I have been using the same document you sent as a guild but it is not working. The command i used is AT+CUSD=1,"*556#",15 but is not working and i used the same command for

witt.wang-Q · October 25, 2021, 2:47am

What is the reply to the command.

snowgum · October 25, 2021, 3:49am

Depending on your carrier, you may need to drop back to 3G/UMTS/WCDMA for USSD to work.

Derich · October 25, 2021, 4:07am

ATCUSD

Derich · October 25, 2021, 4:08am

It just returns Error

Derich · October 25, 2021, 4:09am

That is the configuration i am using.

Derich · October 25, 2021, 4:11am

witt.wang-Q · October 25, 2021, 5:18am

You can use AT+CREG?;+CGREG?;+CEREG? to check the current network registration status.

Derich · October 25, 2021, 5:52am

Derich · October 25, 2021, 5:53am

That is the output of the commands

Derich · October 27, 2021, 11:55am

please what is the next thing for me to do. I need to make this USSD to work.

snowgum · November 1, 2021, 7:43pm

What provider’s SIM are you using?

That “OK” response followed by the “ERROR” looks to me like the modem is getting something back from the provider which it can’t handle properly (ie, it can’t put into a “+CUSD:” unsolicited response).

Have you got this USSD string working on another device with this provider?