For some reason my phone sometimes makes no noise when I get a text, and others it makes the normal message tone sound. Other times it does like half a tune -- as if it's been cut off by something. It's quite annoying as I often forget I'm texting someone as I'm busy a lot and until I look down I don't know I've received one. I'm presuming I'm just missing a setting or something, but anyone had any issue similar? I googled and nothing came up.