I dropped my iPhone 4 into the toilet and retrieved it as fast I could. Put it in a bag of rice for a couple days, until it was dried out. Then I plugged it in as the battery was dead. While plugged in, it will show a silver apple logo on a black background, and will bring you to an ability to dial emergency numbers and it tells you to connect to iTunes. When plugged into the computer with iTunes running, it will not show up as a device in iTunes and will simply show the apple logo on a black background. Is it a goner? Just needs a new sim card? Thanks!