Hi I have been looking for the solution to this problem for quite sometime now. I want to make my app/LaunchDaemon able to run even if iPhone goes to deep sleep (low power mode, usually after 10 mins of sleep). I have googled for it and found a way of preventing iPhone to go to Deep sleep by playing a Silent Sound every few seconds, but its not that efficient as it eats up the memory like hell (Think if my app/LaunchDaemon wants to perform some operation once in a day. playing a silent sound throughout the day is very lame). Anybody ever tried such a thing? Any Suggestions??