If my impression is on sound and vibrate when i get a text message it will play the sound and vibrate but randomly it just vibrates with an icon at the top saying i have a text but really i dont. And i still have the sound on but it just vibrates, no sound. The icon ill go on then go off. Its so strange and very annoying plus how am i supposed to put it on vibrate with all these "ghost texts" coming to me?