Fastboot is a protocol used by Android to diagnose and flash new firmware images on an Android devices via USB. It is part of the Android Debug Bridge (ADB).

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HTC Sensation fastboot unknown device

i want to apologize because i think you get this question a lot, but i experience problems trying to root my HTC Sensation. I turned USB Debugging ON, checked that Fast boot is turned ON in Settings ...
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43 views

Are there other ways to enter fastboot mode if the power button is broken?

I've dropped my phone (ATRIX HD) and now it isn't turning on. The thing is when I connect to charger it shows the green light and start to boot (Motorola logo appears) but then it keeps restarting ...
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199 views

BOOTLOADER - USB Device Not Recognized

I am currently using a ROOTED "Huawei MediaPad 7 Lite" tablet and am having issues entering the bootloader. When powered on and connected to a PC, the device is seen in adb using the command adb ...
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64 views

Bootloop phone wont boot after boot screen

Folks, I've rooted by buddy's phone and tried changing the boot animation to marvel boot screen, but unfortunately the phone won't boot further it keeps looping at boot animation. Now the phone's ...
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335 views

Can't unlock bootloader

I'm trying to unlock the bootloader of my tablet for hours now.. There's no solution out there that worked for me. I've already tried: fastboot oem unlock (the tablet responses with a question ...
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0answers
238 views

OS Features missing after upgrade to Android 5.1

I just updated my Nexus 5 from Android 5.0 LPX13D to 5.1 LMY47I. Some components of the OS now seem to be missing. When I scroll with two fingers from the top of the screen I only get the ...
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302 views

Asus Transformer Tab tf300t stuck on asus screen. No ADB, no fastboot, no recovery, no os

I'm very happy with cm11 on my Galaxy s3 so i wanted to try it on my tf300t. First i unlocked the bootloader which i succeeded in doing. Then i flashed clockworkmod recovery via adb. However, when i ...
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2k views

Installing Android using only fastboot on HTC Vision

I lost my system somehow. My phone turned off and reboots during starting up. I'm only able to go to hboot (fastboot/recovery etc.) on my phone, and I'm unable to run Android system. I have tried ...
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Installing custom ROM on HTC phones over Fastboot or ADB

I am trying to build CyanogenMod for Sensation. After building I have update.zip, which I can install over CWM recovery manually. But how do I install the ROM over Fastboot or ADB in order to automate ...
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46 views

Yureka fastboot not detected in LINUX, but adb detects device

fastboot detects Redmi 2, but not Yureka. I am trying to install Cyanogenmod in Yu Yureka. When I tried installing the CM zip with default recovery, it failed stating "Signature Verification Failed". ...
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42 views

problem loading fastboot and recovery

I have a Croma CRXT1125 tablet. I was trying to flash a custom recovery and some problem occurred. The recovery failed to flash and the stock recovery is also not opening now. Stock recovery worked ...
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131 views

Sony Xperia SP C5303 not booting into fastboot mode

Device: Sony Xperia SP C5303. I turned off the device, then hold volume up key, and plugged the USB cable. But I see no blue light. After a while it goes into charge mode. What could be the ...
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249 views

Moto G XT1039: Random reboots to bootloader with “failed to initialize partition table” message

I have a Moto G 4g (peregrine XT1039), which in every one or two days reboots to bootloader with "Fastboot reason: failed to initialize partition table", see Image(1). In Image(2), you can also see ...
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191 views

Moto G doesn't boot anymore, not even into recovery

My Moto G 2013 (XT1033) was working (except for the issue I described here, but the other features all working), I restarted it but it didn't come back. I was dropped into the 'AP Fastboot Flash ...
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210 views

Moto G 2014 XT1068 is bricked. Keeps looping and won't boot. What to do?

Ok so here's a couple things about my phone: Its bootloader is unlocked, it is rooted, and it has a custom recovery (TWRP). The problem is, my phone got stuck in the "WARNING, BOOTLOADER IS UNLOCKED" ...
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60 views

Fastboot hanging after first command (osx)

My fastboot binary from OSX is responding weirdly and i can't figure out why. It seems to work great at first since the first command i'm sending works (and this whatever it is) ; but any command ...
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1k views

How to put LG G2 in fastboot mode?

Is there any way to get an LG G2 (running the latest version of stock software, Lollipop 5.0.2) in fastboot mode? None of the methods listed anywhere online work for me. I'm getting the feeling that ...
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34 views

Bootloader frozen on Nexus 10

My Nexus 10s bootloader is stuck, it keeps saying "Downloading... Do not turn off target!!" and fastboot commands have no affect on it. I also can't use the volume rocker to boot into recovery or ...
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204 views

OS X Yosemite - Nexus 5 - ADB Device Offline

I've been trying to initiate ADB commands on my Nexus 5 using my MacBook Air. However, when I type adb devices into Terminal, my Nexus 5 is listed as offline. I've tried disabling/enabling USB ...
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998 views

fastboot oem unlock: hangs with `…'

First of all, I am a newbie to Android. I am using Ubuntu Gnome 14.10 to run all the commads. I am trying to unlock the bootloader of my Lenovo A536 (stock Android 4.4.2 aka KitKat). Here is what I ...
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3k views

Nexus 5 stuck on boot loop after restarting while upgrading the OS

Last week, I received an update on my Nexus 5 for Lollipop 5.0.1. Version 5.0 was working fine, so I decided to just update. However, a few hours after updating, my phone started to lag and freeze, so ...
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301 views

Recover data from non-booting Android

I have an HTC Once Mini that will not boot. It has stock firmware on it (no root, no replaced bootloader, no custom recovery, just plain old stock HTC firmware). It will start to the bootloader and ...
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1k views

How to detect if bootloader is unlocked when fastboot doesn't work?

I have this tablet that runs on RK3168 (Rockchip) SoC. The problem is that fastboot doesn't recognize the device, but after so much toil, I managed to find Finless' flashing tool and flashed CM ...
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996 views

Rooting note 3 - fastboot not unlocking or detecting

I have been reading so much trying to find the answer to this problem, but I can't find any. I am not quite sure what to do at this point. I am running XUbuntu and I am trying to to root my SM-9005 ...
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4k views

Fastboot: Lock state - Locked on nexus 7

I am having trouble unlocking the bootloader on my Nexus 7. When I boot into fastboot I see the message LOCK STATE - LOCKED. I want to unlock the bootloader so I can re-install the stock operating ...
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43 views

OS X utility to create stock images

Before I spoil my new HTC One. I needed a little help with the following Create a backup of the recovery Create a backup of the system Create a backup of anything that maybe required to bring the ...
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476 views

Desire HD: I apparently flashed the wrong pd98img.zip, how can I fix this?

in a attempt to downgrade my Desire HD from 2.50 to 1.32 I apparently pushed the wrong pd98img.zip into my zip card. I can start the phone, but I'm greeted by some chinese characters and can't do ...
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2k views

Unbrick HTC Desire

This is my output of fastboot getvar all (bootloader) version: 0.5 (bootloader) version-bootloader: 6.93.1002 (bootloader) version-baseband: 5.17.05.23 (bootloader) version-cpld: None (bootloader) ...
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3k views

Failed to get_identifier_token from HTC Desire HD with fastboot

My HBoot is HBOOT-2.00.0027, I got the following problem when I was trying to unlock my HTC Desire HD following the instruction http://www.htcdev.com/bootloader It seems HBOOT 1.0 has this problem ...
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481 views

How to recover Samsung Galaxy Fit using software that works on Ubuntu?

I tried to install the new Jelly Bean on my Samsung Galaxy Fit, but it got stuck during installation with an error on /tmp/slideloadpackage.zip. Now, my original Android OS lost. How can I recover ...
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Is there a way to boot to the fastboot mode?

I booted to the TWRP recovery for the first tiem and played with it by wipping everything using all the wipe options. Then I ended up unable to boot to the fastboot mode, normal mode or recovery mode. ...
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794 views

Boot custom kernel via phone

I can currently boot a custom kernel (without flashing it) for test purposes by using fastboot on my computer via: cmd> fastboot boot customkernel.img Which works great. I've found great kernels ...
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3k views

How to install fastboot drivers?

I have a cheap clone android (benss b3) that I managed to connect to win 7 by editing the .inf file in usb drivers. Now I want to load different ROMs via fastboot. However, when I boot to fastboot ...
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Y300-0100 Hard Brik

I Have Huawei Y300-0100. And i cant go to recovery. Just fast boot and adb. And update screen (boot loader). I unlocked it before and now i cant lock it because i got invade key or image ...
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18 views

Bootloader (fastboot mode) unresponsive after update from HHZ11k to HHZ12d (Nexus 5)

I have a rooted + Xposed installed Nexus 5 with Android 5.0. Two days ago it rebooted without any reason, underwent a few bootloops, and then got hard bricked. No idea why. Normally, forums say there ...
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9 views

Galxay note 2 not recognized in fastboot mode

I recently updated my rooted note 2 (n7100) using omniROM 4.4.4 kitkat from Here. After I flashed the recovery image and updated the ROM, my root got lost, and I was also unable to get into recovery ...
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28 views

System wiped on LGL31L, can't enter recovery or fastboot

I have an LGL31L (also called the "LG Access", it's an LG F70 D315 variant) that has a wiped /system/ (I accidentally wiped it while trying to resolve a bootloop after a botched factory reset), and I ...
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28 views

Oppo find 7: bootloader re-lock inpossible?

I tried to relock the bootloader on my Find 7 (which I'm pretty sure it was unlocked since I installed a custom rom). fastboot oem lock ... After that nothing. Windows console is "stuck". Any clue? ...
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22 views

Android Highscreen Alfa R stuck in recovery mode, help?

today the phone got stuck during normal usage and I had to unplug the battery in order to restart it. However, it is stuck in recovery mode. Selecting any option given by the recovery will just close ...
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27 views

What is the version-main meaning?

While in fastboot I can obtain the version-main variable by fastboot getvar version-main command. Sample input and output below: fastboot getvar version-main version-main: 4.21.69.4 What ...
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84 views

Creating and flashing image to Android device

I have created an image of my Android device (Lenovo A6000) using the command adb shell -c su 'dd if=/dev/block/mmcblk0p23 > data.img' Now I would like to flash this image to the same device, ...
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106 views

fastboot flash works but does nothing (moto g)

My moto g get stucked on a blank screen after the motorola logo animation. I tried going into the recovery and wiping data and cache. Nothing happened. I tried unlocking the bootloader --> No ...
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41 views

Nexus 7 - Stuck on boot animation. Fastboot detects device but ADB doesn't

My Nexus 7 (2012, WiFi) is stuck on the boot animation. I can detect it in Fastboot but not with ADB. Is it still possible to backup the data before I wipe it? It's not rooted and the bootloader is ...
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34 views

Create a custom recovery from scratch

I have an obscure Android phone (Orion Pro x500a). I have another question which led me to ask another concerning custom recovery files. Since my phone is rather obscure, I can't find a custom ...
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72 views

Fastboot errors

I know most MediaTek devices don't support fastboot, but I have a Canvas Knight (MT6592) which does reboot into fastboot mode when I use adb reboot bootloader. Here, fastboot devices detects my ...
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does fastboot allow to read partitions?

I know the binary fastboot does not allow to read, only flash, partitions. But is it a limitation of the tool on the computer side, or the protocol/program on the phone? does the fastboot protocol ...
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853 views

LG G2 D802 (No Download Mode)

I have downloaded Lollipop for G2 D802. But when I flashed it, it shows fastboot mode started. I have followed a thread on XDA and flash LAF.img via fastboot but still no download mode (only ...
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393 views

LG G2 “Fastboot mode started”

Hello guys I have flahed Lollipop zip via TWRP successfully (LG G2 D802) but now phone is only booting in "fastboot mode started". I have also tried to repair download mode by following xda forum but ...
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82 views

Bricked Nexus 7 unable to be recognized by fastboot or adb

After trying to install a custom ROM (Ubuntu Raring) to my 2012 Nexus 7, it incorrectly installed and I am stuck with a devices that boots solely to BusyBox. Specifically a terminal that says: ...
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162 views

Recover bricked android device

I have an android device (YotaPhone 2 actually) that is in continuously rebooting state with android logo showing on main screen. When phone wasn't bricked then was possible to boot into official ...