How to get connected wifi BSSID ?

How can I get BSSID (MAC address of the wifi router I'm connecting in) in my Unity Game App on Android and iOS phone?

I have tried these method but none of them working. Please help

*Method 1: This code work fine and get the correct BSSID info but it's only work on Editor, when I build it to Android App it's not working, return string is nothing.

     string mac = "";
     var card = NetworkInterface.GetAllNetworkInterfaces().FirstOrDefault();
     if (card == null)
         return null;
     else
     {
         byte[] bytes = card.GetPhysicalAddress().GetAddressBytes();
         for (int i = 0; i < bytes.Length; i++)
         {
             mac = string.Concat(mac + (string.Format("{0}", bytes[i].ToString("X2"))));
             if (i != bytes.Length - 1)
             {
                 //This is just for formating the final result
                 mac = string.Concat(mac + ":");
             }
         }
         mac = card.GetPhysicalAddress().ToString();
         return mac;
     }

*Method 2: I'm using AndroidJavaClass to call an android function to get BSSID on Android Phone. Since this method not working on Editor, I build and run this on Android Phone but no string is return

     string mac = "";
     AndroidJavaClass jc = new AndroidJavaClass("android.net.wifi.WifiInfo");
     mac = jc.Call<string>("getBSSID");

More specific information about android "android.net.wifi.WifiInfo" class here: https://developer.android.com/reference/android/net/wifi/WifiInfo.html#getBSSID()

I'm new to unity and my English is not very good. Hope you gus can help me.