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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Operating system in a phone having no OS

I have sony xperia P and i was trying to install custom ROM in my phone.I copied the boot.img in the boot partition.Now my phone doesn't starts. There is no external SD card slot in my phone. How ...
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1answer
543 views

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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1k views

“fastboot -l devices” returns nothing

I'm a newbie trying to learn about what alternative firmware I could use to upgrade my Nexus Galaxy from Android 4.2.1. After connecting the phone to my Windows PC with a USB cable, I followed this ...
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1answer
3k views

Can I lock the Nexus 4/7 bootloader after flashing a non-stock ROM?

I know that doing a fastboot oem unlock will both unlock the bootloader and wipe the data on the device. Unfortunately, while this allows me to install a non-stock ROM like Cyanogenmod, my ...
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242 views

Issue with the adb shell on a tablet 20080411

Hello i am trying to fastboot my tablet serialno 20080411 my problem is when i try to acces in the shell of the tablet that happens the problem, i try to make a ls the system said /system/bin/sh: ls: ...
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3answers
40k views

fastboot doesn't see device

I've read a lot of articles about this problem but I can't resolve it. I decided to install my developer application on phone using wifi. To do this I need to do some things with my phone. The first ...
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1answer
8k views

How to Retrieve SD Card Files via fastboot or recovery?

I have a Nexus 4 (LG E960) running rooted stock 4.2.2/JDQ39. The phone fell from a foot high and the screen cracked. The touchscreen no longer works. I have a full Nandroid (TWRP type) backup under ...
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1answer
887 views

mounting google nexus s on linux at fastboot mode screen

I have looked at similar questions but could find an answer. Device: Samsung google nexus s i9020 OS: Android 4.1.2 The phone mounts when the OS has loaded and when there is an option to enable usb ...
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1answer
948 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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1answer
3k views

Nexus 10 won't boot after attempted unlock/root

I have a brand new Nexus 10 which is supposed to be a present for my partner for tomorrow. I wanted to have it rooted and set up for her before I gave it to her, so I installed WugFresh NRT on my ...
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1answer
185 views

Enter fastboot commands from an Android phone

I want to do the following without a PC, just directly from an Android phone using a script / Android Terminal: Reboot into bootloader, and then enter a few fastboot commands Is this possible?
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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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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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2answers
17k views

Unlock bootloader using fastboot using Ubuntu/Linux

I am trying to unlock bootloader for my HTC Legend. I have ADT (Android SDK according to release 21.1) on my Ubuntu/Linux box. While following the HTCDev instructions to unlock bootloader of HTC ...
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0answers
415 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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1answer
256 views

Fastboot setserial command

I noticed that a lot of descriptions of fastboot mention a command named setserial which not available in the current version that comes with Android SDK. You can see the complete list of commands ...
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1answer
770 views

My Kindle Fire is stuck at the yellow triangle screen after installing TWRP. How can I fix this?

I followed the instructions on the official TWRP site on how to install TWRP on the Kindle Fire. So I did wget <twrp.img> adb shell idme bootmode 4002 fastboot -i 0x1949 flash recovery ...
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3answers
16k views

How do I disable Fast boot without the Power option in Settings?

I went over some of the old forum posts about this issue and there seems to be a lot of confusion about this. I am planning to root my HTC Desire (GSM) which at the moment is running original UI/ROM ...
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1answer
423 views

Erase successful, but not automatically formatting. Can't determine partition type - Jelly bean 4.1.2 with Nexus S

While I ran the command - fastboot flashall -w I got the following error - -------------------------------------------- Bootloader Version...: I9020XXLC2 Baseband Version.....: I9020XXKI1 Serial ...
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1answer
7k views

fastboot not working on my Nexus 4

I'm trying to root my N4, and fastboot doesn't seem to work. Running it on linux, and the fastboot binary seems to run. 'Fastboot devices' produces info on my device, but 'fastboot oem unlock' just ...
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1answer
437 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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2answers
37k views

Flash boot.img without using fastboot USB

So I've recently rooted my phone and tried a ROM or two. I find it really handy that you can use TWRP recovery to install another ROM from the SD card, you don't need to have it connected to a PC. ...
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1answer
5k views

I can FastBoot my device. How can I reinstall an Android image to it?

I accidentally deleted a file from my phone (Sky iVega IM-A800s, Gingerbread) and phone cannot boot now. I'm seeing an "System operating error" and device restarts repeatedly. I could get into ...
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1answer
139 views

Prevent unauthorized image flashing

I wonder whether there is a way to prevent someone to use fastboot to flash an Android device. Indeed, while one must be able to turn on USB debug in order to run adb, the bootloader does not offer ...
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2answers
8k views

How Can I Pass Bootloader (Huawei Y200 stuck logo/ Boot-Loop)

I have recently learnt a few things about Android and its system. I have a Huawei Ascend Y200, and I flashed it with ClockworkMod specifically for Y200 with a computer and it worked. I rooted my ...
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2answers
1k views

What are the consequences of installing CWM?

I installed CWM sometime back and switched back to a stock ROM. When I installed CWM I lost my userdata, by which I mean the phone started as it would for the first time after opening the box. I used ...
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1answer
653 views

How to Install our android image in laptop ? How to make android boot-able image for laptop?

I have Android Source Code image and i want to install it on Laptop . I want to know how we made bootable image for laptop with android image. What I have to do so that laptop detect the android ...
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0answers
1k views

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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1answer
983 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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0answers
1k 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 ...
10
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1answer
12k views

Clean way for flashing factory image on Samsung Galaxy Nexus?

Is this the correct and clean way for flashing factory Jelly Bean image on Samsung Galaxy Nexus, without using any external tool (apart from Android SDK)? I don't want to to break my phone, so I'm ...
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1answer
2k 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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2answers
13k views

Obtaining root by modifying default.prop(ro.secure)?

To get a privileged shell you need to modify the following lines to the given values in the default.prop file ro.secure=0 ro.debuggable=1 persist.service.adb.enable=1 I have the extracted the ...
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0answers
3k views

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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2answers
9k views

Samsung Galaxy S3 with fastboot

I have a Samsung Galaxy S3 (international and unlocked). I recently downloaded the kernel source code from Samsung's website and have successfully compiled and now have a zImage file. My problem is ...
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2answers
3k views

HTC Wildfire won't boot

My HTC Wildfire will not boot up. When I boot normally with the SD card in, I only get a screen that says "Fastboot" with the options bootloader, reboot, reboot bootloader and power down. It says to ...
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1answer
644 views

Is the kernel flashed automatically from CWM?

By this, I mean, while flashing a firmware (update.zip) from ClockworkMod recovery, is boot.img also flashed or do I need to use fastboot separately?
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1answer
570 views

Droid2 Fastboot

How to get the droid 2 to enter fastboot? Running rooted phone, CM7 nightly 239 Power + x gets me recovery Power + Up gets me bootloader
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1answer
308 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 ...
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2answers
7k views

Extract boot.img

I have pulled boot.img from my phone's CWM backup. How do I extract it? I tried split_bootimg.pl. But throws an error - Android Magic not found in boot.img. Giving up.
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1answer
8k views

Android boot-up messages for debugging?

I am trying to figure out if Android (i.e. Galaxy Nexus, Nexus S, and/or Motorola Xoom) come with some sort of capability to produce a "boot-up" log. (kind of like Linux boot-up screen) It would be ...
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0answers
575 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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1answer
562 views

Nexus S downgrade with Clockwork Mod

I have a Sprint Nexus S 4G running ICS Cyanogenmod 9. I want to run 2.3.6. In CWR I've backed up, wipe/erased, wiped Calvik cache, but when I go to install my Sojus 2.3.6 file I get Installing ...
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1answer
803 views

How does the safe/fastboot/recovery mode differ from the normal as seen from windows pc?

This is a related question to: How to install fastboot drivers? I have trouble using the command line fastboot program. I think that I don't have the correct drivers installed. How can I verify ...
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0answers
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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2answers
23k views

Problem unlocking HTC phone using their fastboot program

According to HTC, my Amaze 4G is fully ready from the factory to be queried for its identifier tolken, but when I run the appropriate command, it doesn't work. I get: $ fastboot oem ...
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1answer
6k views

How can I get the fastboot command?

I'm trying to root my KF 6.3 following this article. http://forum.xda-developers.com/showthread.php?t=1568340&page=1 Now I'm in Kindle Fire screen (fastboot mode) but fastboot is missing. ...
2
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1answer
537 views

Restoring Nexus S to factory everything

I'm running a Nexus S i9020A on CM9 ICS 4.0.3, with a Matrix 1.46. I've found this website which seems to contain a fastboot image. I was wondering if I use the fast boot image on my Nexus S. Would ...
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3answers
5k views

Getting Segmentation Fault on recovery

It's an Android 4.0.3. I'm trying to fix my tablet, because it doesn't start anymore. running fastboot devices returns nothing. Then, I'm trying to do that through adb. adb devices returns List of ...
5
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1answer
593 views

Phone boots very slow and restarts by itself

My problem is when I turn on the phone, the Google logo stays stuck and after unknown minutes boots in with the software animation, but very slow and then starts over again! First a little history of ...