shutting down means you cannot receive phone calls. This is actually one of the major problems linux phone operating system hackers have been trying to solve —

shutting down means you cannot receive phone calls. This is actually one of the major problems linux phone operating system hackers have been trying to solve — idle power consumption is really really important for a cell phone, but most hardware open enough to run custom operating systems on don’t have easy ways to suspend to a reliable low-power state.