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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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
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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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627 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
585 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
876 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
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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
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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
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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. ...
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1answer
541 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
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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 ...
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1answer
608 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 ...
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1answer
613 views

Access root directory?

Assuming that I am not able to start up my phone due to a file that is missing on the file system. Would it be possible to get to my phone's root directory on my computer and to place the missing ...
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3answers
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What does “fastboot oem lock” do?

I've had my phone for months, loading with several firmware, ROMs and OTAs, without ever running this command. What does it do? What I know is that "fastboot oem unlock" displays the confirmation ...
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1answer
2k views

nanddump vs fastboot

I have two identical phones. On one of them I've managed to corrupt the system partition and it won't boot. I have fastboot, root (on the one that boots), but I don't have ClockworkMod --- my phone ...
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1answer
589 views

Where does the Fastboot pull the information from?

I have a Motorola Xoom MZ601 but which is a GSM Wifi model. 3G on Xoom is not wokring currently. So I tried to debug the problem and when I did Fastboot getVars I got following info ...
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1answer
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Problem with unlocking the HTC Wildfire bootloader with HTC unlocker

I tried to unlock HTC bootloader by the official tool but I get to the stage when I issue the command: fastboot oem get_identifier_token Unfortunatly I get error ... (bootloader) [ERR] Command ...
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0answers
509 views

Extracting the radio firmware image from an Android phone

How do you pull radio images off an Android device? Is there any way to do this?
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3answers
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fastboot flash recovery doesn't work on HTC Desire

I'm trying to update ClockworkMod recovery on HTC Desire. Fastboot recognizes the device: $fastboot devices HT03PPL04520 fastboot But flash recovery fails: $fastboot flash recovery ...
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1answer
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downloading 'boot.img' while using fastboot to copy ra recovery

In the process of attempting to get Cyanogen MOD onto my HTC Hero. I rooted it successfully, and can connect with ADB. I restarted the phone with the back key held down and get the fastboot screen. ...
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2answers
4k views

Can't boot to Clockwork Recovery on Atrix (several methods tried)

I have a Motorola Atrix 4G, with AT&T Carrier. Android 2.3.4 EDIT 11/6/2011: I don't know if this means anything, but I don' have an sdcard in it. I have rooted it using this tutorial. I ...
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1answer
1k views

USB drivers on the xperia play

I'm helping out a friend with rooting Xperia play, I spent 5 hours trying to root it yesterday with him and we couldn't. We tried gingerbreak and z4mod but they did not work, so we tried the fastboot ...
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1answer
4k views

How do I unlock the bootloader on my Sony Ericsson Xperia mini pro?

I own a "Sony Ericcson Xperia Mini Pro" (model number SK17i) running Android 2.3.3 (Kernel 2.6.32.8-perf, build number 4.0.A.2.335). It's branded by Orange Austria. I'm looking for a way to root it, ...
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1answer
371 views

What's the name of the protocol that android devices use in debug mode?

I have a strange Android prototype what we got from a customer. Said customer has forgotten about it, and I'm now fiddling with it to see if I can make it do anything interesting. The device appears ...
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2answers
1k views

Install zImage on Android 2.2 devcie

How do I install zImage on Android 2.2 device? I have one galaxy tab 7.0 and one NVIDIA Tegra 250 delvel kit. I was trying to using fastboot on NVIDIA Tegra 250 but I failed. I could load zImage ...
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1answer
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Unlocking the Bootloader on a Nexus One with S-On

I'm interested in rooting my (Very recently bought) nexus one, and installing Cyanogenmod over Fastboot. However, on the boot screen of my device I've noticed the first line tells me that security is ...
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4answers
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Anyone have an alternative dowload site for a fastboot binary?

I'm working on rooting my android kernel and most sites list http://android-dls.com/files/linux/fastboot as the place to look for the fastboot binary. However, I've been getting a 404 (Page not Found) ...
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1answer
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How to unbrick/reflash Nexus S using stock ROM, stock tools

I have a Nexus S that seems to have bricked itself. I have never modded the ROM or phone, and it was totally stock. Now, it boots right int the white Google logo and stays there forever (I let it ...
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2answers
1k views

How to unlock Nexus S 2.3.3 bootloader without having to wipe all device data?

The usual way is to execute: fastboot oem unlock But this will erase all my private data.
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1answer
509 views

Nexus One can boot only with USB fastboot

After making some changes to my Nexus One, I can't boot it normally, but I can boot it with USB fastboot, like this: $ cd 1.0-GRI40-nexusone-superboot $ ./fastboot-linux boot boot.superboot.img How ...
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votes
1answer
2k views

Stock Android on Nexus S - “invalid magic code”

I have a Nexus S (2.3.3, GRI54/I9023, bootloader unlocked, clockworkmod recovery installed, rooted) and I'm trying to flash it with a stock system.img that I built myself (no modifications - yet). To ...
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2answers
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How to boot into the bootloader when you have ClockworkMod?

I want to upgrade the radio and I'm not sure how to boot into bootloader. When I try to power the phone using VolumeDown+Power, I do get into the ClockworkMod Recovery, but it seems that this is not ...
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1answer
765 views

Recovery from fastboot

I have a Sanyo Zio that is completely non-functional but for being able to get into fastboot. Two questions: 1) I gather that the answer to this problem generally is to install a boot.img from ...
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1answer
752 views

Will fastboot not proceed with flashing if battery level is below certain percentage?

I'm trying to re-install Clockwork recovery mod (tl;dr: Android 2.3.1+ will reinstall stock recovery on every boot if it's not present). I had installed it successfully yesterday, but today it does ...
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2answers
25k views

Installing ROM from Fastboot — Can someone help?

I have a new HTC MyTouch (32A) that I tried to install a new ROM on using ROM Manager. I have done this many times (maybe 100 times), once in a while it goes wrong. Now, with this one, it can't get ...