I cannot fix this. Nor can I figure out any way to work around this. It is extremely annoying. For some reason the ringer on my phone will randomly turn on. I have no clue why. I keep the phone on vibrate at all times because it annoys me to no end to hear phones ringing in public. I had no problem with this on the DInc2. I set it to vibrate one time and never had to mess with it again. On this phone at least twice a day, it'll flip back to full sound. Usually it's in the morning, but yesterday evening it rang unexpectedly as well. I have no clue why and can't recreate it. It's annoying enough that I'm tempted to chunk the phone because I can't stand it randomly changing settings with no input from me. Any ideas why it is doing this?