I recently downloaded the Alarm App so as to have one in addition to my radio clock. But it's never went off at all. I went to Alarm App. Then I maxed up my alarm volume to the highest it could go (cause I'm a heavy sleeper). I set the most annoying alarm (to me it was the sonar one) and I set it to rapid flash j-i-c. I MADE SURE that everything was set and and on. It never even went off, and i could tell, because I had it set for the exact same time as my radio alarm which went off. -I DO NOT have a Task Killer downloaded on my phone. -I DID set my Alarm volume uber high and rechecked it many times.