fastboot

{{Short description|Recovery mode included in Android mobile operating system}}

{{For|the PC fast booting ability|Instant-on}}

{{Distinguish|text=the Android recovery mode or the Samsung specific Fastboot alternative called Odin mode}}

{{Infobox software

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| name = Fastboot

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| screenshot = File:Fastboot.png

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| caption = Fastboot text-based user interface

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| author = Google LLC

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| repo = [https://android.googlesource.com/platform/system/core/+/refs/heads/master/fastboot/ android.googlesource.com]

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| included with = Android SDK

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| language = C++

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| genre = Firmware communication protocol and implementation thereof

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Fastboot is a communication protocol used primarily with Android devices.{{Cite web |url=https://android.googlesource.com/platform/system/core/+/refs/heads/master/fastboot/README.md |title=Fastboot Protocol Documentation |website=android.googlesource.com |access-date=2019-07-07}} It is implemented in a command-line interface tool of the same name and as a mode of the bootloader of Android devices. The tool is included with the Android SDK package and used primarily to modify the flash filesystem via a USB connection from a host computer. It requires that the device be started in Fastboot mode. If the mode is enabled, it will accept a specific set of commands,{{Cite web |url=https://lifehacker.com/the-most-useful-things-you-can-do-with-adb-and-fastboot-1590337225 |title=The Most Useful Things You Can Do with ADB and Fastboot on Android |last=Ravenscraft |first=Eric |date=2014-06-13 |website=Lifehacker |language=en |access-date=2019-07-07}} sent through USB bulk transfers. Fastboot on some devices allows unlocking the bootloader, and subsequently, enables installing custom recovery image and custom ROM on the device. Fastboot does not require USB debugging to be enabled on the device.{{Cite book|last=Tamma|first=Rohit|url=https://www.worldcat.org/oclc/910639389|title=Learning Android forensics : a hands-on guide to Android forensics, from setting up the forensic workstation to analyzing key forensic artifacts|date=2015|others=Donnie Tindall|isbn=978-1-78217-444-8|location=Birmingham, UK|pages=113|oclc=910639389}} To use fastboot, a specific combination of keys must be held during boot.{{Cite web|date=2017-01-26|title=How to Use ADB and Fastboot on Android (And Why You Should)|url=https://www.makeuseof.com/tag/use-adb-fastboot-android/|access-date=2021-08-04|website=Makeuseof|language=en-US}}

Not all Android devices have fastboot enabled,{{Cite web |date=11 January 2017 |title=The Easiest Way to Install Android's ADB and Fastboot Tools on Any OS |url=https://lifehacker.com/the-easiest-way-to-install-androids-adb-and-fastboot-to-1586992378 |access-date=2021-08-04 |website=Lifehacker |language=en-us}} and Android device manufacturers are allowed to choose if they want to implement fastboot or some other protocol.{{Cite book|last=Drake|first=Joshua J.|url=https://www.worldcat.org/oclc/875820167|title=Android hacker's handbook|date=2014|publisher=Wiley|others=Zach Lanier, Collin Mulliner, Pau Oliva, Stephen A. Ridley, Georg Wicherski|isbn=978-1-118-60861-6|location=Indianapolis, IN|oclc=875820167}}