LTE & Lora/Sigfox Antennas

  • I read in the documentation that you must attach the antennas when using LTE, Lora and Sigfox.
    The questions are:

    1. Is it realy safe to turn the board on without the antennas when using only the Wifi or BLE radio?
    2. When does the LTE or Lora/Sigfox antennas are really necessary? When are the radios tuned on and off? Is there a command for that?

    Thanks in advance.

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