How to get GSM strength?

Hello, I am trying simply get strength of GSM signal and show this value to screen, but I can´t figure it out, why it is not working?

private Network network;

    public Network GetNetwork()
        return network;

    public void getGSMstrength()
        var sila = GetNetwork();

        gsm.Text = sila.CurrentRssi.ToString();


Are you searching solution for Galaxy watch(native or web) or Mobile?
For galaxy watches, you can check the this API.. I have found this API on public documentation.