I am having trouble with A6 GSM module. I need to activate and use sim toolkit but when I try at commands I am getting CME ERROR 58. (I can make calls, send sms and use ussd with at commands, there is no problem with the connection.)
Some of the commands that I try and get the Error 58:
AT+STSF=1
AT+STSF=?
AT+STGR=1
AT*PSSTKI=1
AT*PSSTK="SETUP MENU",1,1
I am getting CME ERROR 255 when I type these:
AT^STGI=16
Could you please help me? What should I do to activate and use Sim Toolkit?
Thank you, Best regards