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Hello,
Thanks for the answer. However, it doesn't solve my problem.
No registration to network and always
AT+COPS=?
+COPS: ,,(0,1,4),(0,2)
AT+CBAND?
+CBAND: INVALID_BAND_MODE,ALL_BAND
I don't know what to do...
Hello,
I have bought recently a SIM900 shield. I can send to it AT commands and I have the answers.
The problem is that it can't register to the network. I live in France and I have tried with 4 SIM cards from different operators ; always the same. I have plugged a good power supply to the...
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