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Problems using AT+CSIM command | Telit Cinterion IoT Developer Community

zsj's picture

September 10, 2019 - 2:07pm, 3329 views


I have a GSM modem. The SIM card has a custom applet installed that I am trying to communicate with using custom APDU messages but I am having difficulties so am hoping that someone will be able to offer some advice please.

When I send the at command At + csim = 42,"00a4040010AID" to select my custom applet  just reply: +CME ERROR: unknown

My GSM modem responds to many At command even for example when I send  AT+CSIM=14,"00a40000023f00". But when in command P1='04' i.e select with AID reply +CME ERROR: unknown. 

I try to open a new channel first like in the example below:


But reply +CME ERROR: unknown 

I hope anyone can help me.