BT: How to pair and add services

[Mark81]

I'm playing with Bluetooth classes on Qt5.6.
My goal is to handle the pairing of a client, showing up the pin and decide which services connect: A2DP and/or HFP.

Right now I set the local adapter in discoverable mode:

QBluetoothLocalDevice localDevice.setHostMode(QBluetoothLocalDevice::HostDiscoverable);

then I connected all signals to related slots.
From my smartphone I discover the adapter and once clicked the deviceConnected signal is fired. Now I call:

localDevice.requestPairing(address, QBluetoothLocalDevice::Paired);

The pairingFinished signal is fired and after few seconds also the deviceDisconnected one.

Because I request "paired" mode I was expecting also the pairingDisplayPinCode and pairingDisplayConfirmation signals.

Furthermore, how to add services? Is there an example?

[Nankon]

You use QBluetoothLocalDevce LocalDevice.is it available？what's the LocalDevice.isValid() return back?