I have my SIM900 connected to a 12v 2A power source, I have inserted my sim card changed it to 3G/2G(autoconnect) ( I did research it to know wheteher it is possible and it turns out it is, the only problem would be not having the same speed according to them) There are no pin/password on the sim. …

Sim900 AT+CCID ERROR

noobie001 November 6, 2021, 8:20am 5

Still error.

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