how to get event for phone connect

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Win32

WMI

hi i'm trying to catch an event that occurs when i insert my phone to the usb.
i use this code:

var scope = new ManagementScope("root\\cimv2") { Options = { EnablePrivileges = true } };
var q = new WqlEventQuery
       {
           EventClassName = "__InstanceCreationEvent",
           WithinInterval = new TimeSpan(0, 0, 3),
           Condition = @"TargetInstance ISA 'Win32_USBControllerdevice'"
       };
var w = new ManagementEventWatcher(scope, q);
w.EventArrived += UsbConnect;
w.Start();

it works fine for any disk on key, but when i connect a smart phone the event arived when the phone is connected and not when i give the phone permisiion to act like usb devie.

this means that in phones there is another event that is not the connection event but another one.
i know that the Operating System have this event because just when you press on "use Usb Device" it's open the autorun window.

thanks a lot