It was just last week when we mentioned that Microsoft is launching an investigation to finally fix the reported random boot issues on some Windows Phone 8 devices. Microsoft seems to have already identified the problem and is now zeroing on it. According to AllThingsD, the Redmond-based technology giant thinks that it has already spotted the root cause of the problem and it plans to push an over-the-air software update next month to fix it. “We’re continuing to investigate some reports of phones rebooting and have identified a cause with our partners,” Microsoft allegedly said in a statement on Tuesday. “We are working to get an over-the-air update out in December.” However, the company did not reveal the details of the problem, nor did it point out the exact Windows Phone 8 devices affected.