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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ADB/fastboot over Serial/COM ports?

Long story short, my phone messed up and it's stuck in a bootloop. The phone in question is a Coolpad 7560U, also known as Orange Nivo, running Android 4.1.2 Jelly Bean. Data and cache wiping do not ...
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Fastboot not working for Kindle Fire HD

When ever I try to fastboot my kindle fire HD 7 inch. Running 7.4.3 it does not pick up the device (it is also rooted) when I try the command fastboot -i 0x1949 getvar product. I connect the kindle ...
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2k views

fastboot flashall -w Halts

I have a Samsung Nexus S. I have erased recovery and boot pertitions using fastboot erase <partition> and when I do fastboot flashall -w it stops on sending 'boot' (XXXX KB)... What might be ...
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804 views

Is the setting OFF/ON of the security flag different from enabling/disabling of fastboot?

I am following the book XDA Developers Android Hackers Toolkit 2012. In the beginning chapters , it says that : The second-stage bootloader checks to see if the security flag is on (S-ON) or off ...
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1k views

Prevent reboot after fastboot -w image.zip?

Is it possible to prevent the automatic reboot that follows fastboot -w image.zip ? This would be quite useful for batch files. Thanks for any hint :-)
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35 views

Fastboot doesn't see nexus 6p

Currently trying to unlock my bootloader, but cannot get my nexus 6p to determine that it's connected to my PC. I can use adb commands while it's on, but booting it into fastboot mode with the adb ...
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18 views

Can't recover Nexus 5 from bootloop

Hey I am trying to get my Nexus 5 working again. I really need someone to help me troubleshoot this. One day I noticed my phone was off after about half an hour from being fully charged. It wouldn't ...
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1answer
39 views

Wondering if i can debloat some google apps from unrooted lg phone for my father?

My father being older does not want to modify his phone, however he has a LG L70 and no sd card, and doesn't use some unnecessary Google apps, such as play, books, and whatever else. My question is ...
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113 views

flashing twrp on lg g4 no error, but no twrp

I'm trying to flash twrp to my lg g4. I've reached the part where I run fastboot flash recovery twrp.img And everything seems to work fine, but when I try to enter recovery mode, I get the default ...
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1answer
112 views

Device boots normally, but cannot enter recovery or fastboot

I have secondhand Vodafone Smart Tab 4G. It seems to me that previous owner messed something up. The device boots normally but I cannot enter either bootloader, fastboot, or recovery. I have tried HW ...
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211 views

XPeria L stuck in bootloop after flashing Ressurrection Remix ROM

Folks, I unlocked the bootloader and rooted my XPeria L without problems, I then installed TWRP, made a complete backup and tried flashing the Ressurrection Remix ROM. But the phone doesn't boot up ...
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84 views

After installing CyanogenMod 12+ fastboot is not working

I installed CyanogenMode 12+ in my S2 device. Every thing was working fine and I used fastboot to flash the ROM. After installing CM when I go to download mode again, fastboot didn't detect the ...
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170 views

Unable to flash boot.img in htc one v

I'm trying to install a new rom in my HTC one V. I could successfully do everything with my one V until I upgraded my windows 7 to windows 10. I already have CWM recovery. USB debugging is ON . I try ...
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1answer
282 views

Flashed wrong recovery on a QTAB with no bootloader or fastboot. What can I do?

Hey guys I was just tinkering, and it was stupid of me not to take a backup of any kind. Anyway, QTAB doesn't have a bootloader or fastboot menu. When I try adb reboot bootloader or fastboot, it goes ...
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1answer
262 views

Relock Y300 Bootloader

I have hauwei Y300-0100. I unlocked Bootloader Of My phone before for root it. Now i want to flash my phone with stock rom but i cant. I tried to lock my phone with fastboot but i gave an error: I ...
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318 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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125 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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529 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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929 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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901 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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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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503 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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108 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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83 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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627 views

'fastboot reboot' works but not the other fastboot commands

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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461 views

After using SP Flash, Phone wont boot up

Handset : Huawei Honor Holly Root : Yes I used SP Flash Tool to flash a ROM, downloaded from the Official website of the phone company. I flashed all that was given (boot, uboot, recovery, ...
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132 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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50 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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2answers
2k views

Get into fastboot mode without root or hardware buttons

I own a relatively unknown Chinaphone, the CUBOT GT72+ (MTK6572 SoC) - on which I was attempting to gain root access. No known exploit-based root methods exist for this device (which runs on Android ...
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297 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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2answers
442 views

ADB is working, fastboot is not (HTC Desire Z)

The adb devices command is working for me, the fastboot devices command is not (Mac OS X Mavericks, SDK downloaded yesterday, phone is a HTC Desire Z): $ sudo fastboot -i 0x0bb4 -p 0x0c91 devices $ ...
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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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315 views

LG Optimus G fastboot not working

Alright, I have an LG Optimus G that I'm playing around with and trying to install ubuntu on. I'm following this guide I've done everything up to the point where you enter this into the terminal: $ ...
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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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538 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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2k 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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1k 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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655 views

HTC One X hangs at bootscreen, repair centre writes it off

..so am I screwed or what? I was running the ViperX ROM on my One X, based on 4.2.2, and a couple of days ago I started getting FCs on HTC BlinkFeed, even though I wasn't using it. I rebooted into ...
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Meaning of Options in FastBoot Flash Menu

I've just bought my first Android device, a Motorola Moto G. Following the official guide on Motorola website, I learnt about FastBoot Flash Menu. Here there are several options. I'd like to know what ...
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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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2answers
4k views

How can I recover from flashing broken ROMs on my HTC One X?

I am seeking your help to clear up some of my confusion in solving a problem with my HTC ONE X. I tried flashing a custom ROM on my HTC Android phone but all the files and partitions got messed up ...
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47 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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507 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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9k views

Clockwork: error: cannot load 'recovery-clockwork': No error

I am trying to flash a recovery-image file into my Nexus 7 but the flashing fails know that I am working on windows and my image file is located in the same folder as adb and fastboot files are ...
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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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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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502 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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5k views

fastboot does not discover my device

I want to connect my device (Omega T107) in fastboot mode. I reboot in bootloader mode (adb reboot bootloader) Screen is black(0 light comming out of it) computer can discover it and driver installs ...
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536 views

Android PandaBoard: Linux terminal output for debugging?

My research team is currently considering investing in a PandaBoard for Android b/c we are developing a custom kernel/sys-image and would like Linux terminal output. Does the Pandaboard give me ...