AT+CUSD command not responding

IoT Modules
1

AT+CUSD=1,“*2#”,15
OK

I don’t get any response after running CUSD command.

ATI
Quectel
EC25
Revision: EC25ECGAR06A15M1G

What to do now?

2

What happens if you wait 10 seconds and then send the AT command "AT"

Does this flush a +CUSD: result out of the buffer perhaps?