"Doesn't turn on and says to download custom OS."に関する回答Try this it worked for me. Take the back off of the phone so you can remove the battery. Start the phone. When the window comes up to download the OS app. Push the volume up key to start the download. Let run for 10 seconds then remove the battery and keep it out for a minimum of one minute. Put battery back in. Before reassembling the phone. Start it up. It should come on and not be in safe mode. May have to try again. This worked for me. PS. If you shut down. You will have to do this again.