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GSM module M590 SIM Failure

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Abdul Rauf Jangda

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Hello,
Trying to interface M590 with Arduino Uno. Example sketches did not work. Then I connected GSM to my laptop via USB to serial FTDI module. Using arduino serial monitor, communication with GSM Module seems alright as all AT commands responded by M590 module is correct.
But M590 module does not recognize the SIM card. It says SIM FAILURE.
So far I tried 3 working SIM cards, from BELL, WIND and MOBILICITY. All 3 resulted same.

Any idea?

Thanks,

Rauf
 

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