Rebooting to system is just normal Android. Nothing special. If you boot to recovery, you can do stuff like factory reset your phone or install updates. Or you can boot into download mode (aka bootloader). The way you do this varies by phone, but you usually have to press volume down and power.
People also ask, what is a ADB?
Android Debug Bridge (adb) is a versatile command-line tool that lets you communicate with a device. You can invoke a client from a command-line terminal by issuing an adb command. A daemon (adbd), which runs commands on a device.
How do I open ADB?
Using Windows Explorer, navigate to your SDK-directory and open the folder "platform-tools". Hold down the left "Shift"-button while right clicking somewhere inside the folder. In the opened command window, type "adb shell" (without the "") and press enter .
What is ADB and fast boot?
Fastboot is basically a diagnostic tool used to modify the Android file system from a computer when the smartphone is in bootloader mode. The commands are basic, and include, for example, to 'flash' (install) a boot image or a bootloader. You can start in recovery mode from the ADB commands. /