QMI.NetworkAccess.get_signal_strength

You're seeing just the function get_signal_strength, go back to QMI.NetworkAccess module for more information.
Link to this function

get_signal_strength(qmi)

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Specs

get_signal_strength(QMI.name()) ::
  {:ok, QMI.Codec.NetworkAccess.signal_strength_report()} | {:error, atom()}

Get the current signal strength