I am using a SIM Modem accessed via Putty from my windows pc. Everything works fine, I can send at commands and receive results for example AT+CUSD=1,"*133#",15 will return +CUSD: 0,"You have 3,596 IQD, valid until 30-06-2021.",15 even other ones show a list of options. But only one certain command that directly asks for a pin code is not returning any result.
I have tried the same code with the same SIM Card on an android phone and it work fine, I have looked at other similar questions and no one has the same problem as mine. Is there any command to activate secure USSD responses? I am literally lost I don't even know what to ask for other than why I don't get a response for one certain short code?