the dialog sppear always (paired or not) on some devices (ASUS Fonepad7 with Android 4.3, HTC WiidFire with Androd 2.2.1), and never on thers (Samsun Galaxy Note GT_N8000 with Android 4.1.2),
and i don't know the reason.
On ASUS Fonepad7, HTC WiidFire, appear like notification.
On Galaxy S4 with Android 4.4.2, appear allways on top, with paired and not paired devices,