My device is Samsung Galaxy S3 I9300 and I did a complete factory reset. The device is NOT rooted yet. It works properly. I can do all of the following with my device:
- Power off using device keys.
- Start in recovery mode and download mode using device keys.
- device is detected properly in normal mode and recovery mode by
adbwhen is connected to PC through a USB cable
- I am able to reboot the device using
adb reboot recoveryworks well.
The problem is that if I run
adb reboot bootloader or
adb reboot-bootloader commands, the device is booted in normal mode, NOT in download mode. The only way to reboot the device in download mode is to use the Power + Volume Down + Home keys