Corona IOS, notifications not vibrating.

Hi

I am sending custom notifications that look like this:

  local  t= {
               alert  = userName…" "…message,
               badge = 1,
               custom = {docId = docId}
             }

Notifications are working perfectly, the only issue is that the phone does not vibrate when getting a notification (application in background or closed).

I think it is a problem because I  haven´t added a sound. what is the default sound? notification.wav?

I think it is a problem because I  haven´t added a sound. what is the default sound? notification.wav?