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LTE CATM1, NB IoT, 4G, 3G, 2G GSM shields frequent ask question (FAQ) section

 
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REMOVE SIM CARD PIN CODE CHECKING



Connect the GSM module to your PC, via USB. Install USB driver, if needed [USB drivers are available in downloads section].
Start the modem having the SIM inserted into the SIM slot.
Open your favorite terminal utility [we use Terra Term]. Open the USB serial port, selecting 115200bps.

Proceeed with following AT exchange [we assume the PIN CODE is "0000", replace with your SIM card PIN code!!!]:
AT+CPIN?
+CPIN: SIM PIN

AT+CPIN=0000
OK

AT+CLCK="SC",0,"0000"
OK

AT+CPIN?
+CPIN: READY

OK


* the AT COMMAND is represented in RED
* your MODEM RESPONCE is represented in underlined GREEN

Done!

 

 

 

 

this tutorial was written by Dragos Iosub.

 

document version 1.01 / 2019-04-05 © R&D Software Solutions srl