Connected via AT&T iot sim stopped working

  • Using Gpy with expansion board 3. I was able to setup and connect using AT&T iot sim using:

    # While the configuration of the CGDCONT register survives resets,
    # the other configurations don't. So just set them all up every time.
    print("Configuring LTE ", end='')
    print(".", end='')
    lte.send_at_cmd('AT!="RRC::addscanfreq band=17 dl-earfcn=5780"')
    print(".", end='')
    print(" OK")

    Then registered the device through pybytes and did an integration azure.
    Now the device does not connect. re installed firmware for modem and gpy.

    Any suggestions?

  • @irfan5911 figured it out. correct band and earfcn are crucial.

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