Welcome to Android Central! Download Mode (aka Odin Mode) is used to copy a firmware file from your computer when connected via USB, and usually requires you to press Power, Home, and Volume Down at the same time to boot into. If you're not connected and not actively transferring a firmware file, you can safely power the phone down. If you don't see any option to power off or reboot, then press and hold Power and Vol Down together for about 15 seconds to force a shutdown. Then power on normally again. Does the same screen come on again?
03-15-2016 04:20 PM