I always put my phone on do not disturb (the little moon symbol) before going to bed at night and before lying down for a nap in the afternoon. Today, despite it being on do not disturb, two phone calls rang in within half an hour of one another. After the first call rang in, I checked to be sure it was set to do not disturb, and it was so set. So, I turned off the mobile and turned it on again. It was still set on do not disturb. A few minutes later, another phone call rang in. I was so annoyed because I was unable to fall back asleep. I did not recognise either of the numbers if that is significant at all. Anyone have any idea why this is happening? What do I do to correct it?? Never had this problem before since I have owned this mobile. Thanks!