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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Fully Wipe Nexus Device

I have a Nexus 7 2013 WiFi-only (flo) device. I rooted it and just generally messed around with it. Now I want to put it back to complete stock everything (bootloader, recovery, ROM, etc) AND ...
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927 views

Is it possible to unlock the bootloader without root access?

Is it possible to unlock the bootloader without root access? If so, is there another way to unlock the bootloader without using the command... fastboot oem unlock Now, for the background stuff ...
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3answers
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Trying to restore photos from a broken S4 (AT&T), how do I go about it?

My friend broke her S4's screen, and wants to get back the photos from the internal memory. The phone does not have USB debugging turned on, so having it attached to the computer only charges it. The ...
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1answer
208 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
199 views

fastboot flash = FAILED (remote: invalid bootloader image)

After breaking CyanogenMod on my Nexus 5 I want to flash it with a factory image but all I get is: fastboot flash bootloader bootloader-flounder-3.43.0.0114.img sending 'bootloader' (2970 KB)... OKAY ...
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2answers
610 views

Is it possible to run fastboot in a recovery mode shell (without connecting to PC)?

I have a method for unlocking the BootLoader of my HP SlateBook x2 running Android v4.3 consisting of: 1- Booting into recovery. 2- Connecting to PC via USB cable. 3- Sending the command fastboot ...
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972 views

Fastboot doesn't recognize Nexus 5 on L

I recently flashed the dev preview of android L on my Nexus 5, however, I did what is called a "dirty flash" - I just used TWRP and flashed the image as if it was a normal ROM. The result is that it's ...
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1answer
1k views

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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196 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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368 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
872 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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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
662 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
639 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
606 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
2k views

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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1answer
29 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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44 views

Asus memopad7 170C, unlocking bootloader fails

I'm trying too root my Asus memo pad 7 (170C), I've tried EVERY method, using KingoRoot, SuperOneClick, Frameroot, motochopper. None of them worked. So I decided to do the rooting stuff myself, first ...
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Is it possible to unlock the Motorola moto g KXB21.14-L1.41 without official unlock code? [duplicate]

The motorola website for unlocking your boot loader tells me that there are no unlock codes for my phone. Does this mean that this phone cannot be rooted? I refuse to accept that. There must be a way ...
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85 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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43 views

formatted phone storage. Is phone dead? How to revive?

i booted my android phone to enter into fastboot mode and connected to PC by USB. Then a dialog box appeared to format the disk (internal storage memory i hope). I accidently clicked Format ...
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45 views

Fastboot kernel command line parameters

I wanted to use the recovery.img without actually flashing it in my phone. However, when I give fastboot boot recovery.img or fastboot boot recovery recovery.img in my machine, it shows downloading ...
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50 views

My LGG2 is stuck in fastboot and not showing up on the PC

I have tried to add Cyanogen Mod 12 to my LGG2 and flashed my recovery and now it is stuck in fast boot. I have looked everywhere nobody has an answer the phone does not come up on my computer as a ...
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494 views

Moto g 2nd gen, lollipop bootloader unlock issue

I have just bought Moto G 2nd generation smart phone with 16 gb internal memory. To root device, I tried to unlock bootloader. But it didn't go smooth. When I hit command fastboot oem unlock ...
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63 views

MT27i Sony Xperia Sola bootloader unlock on Ubuntu

I'm using Ubuntu 14.10 64bit. I think this is a problem with the fastboot program. The device is Sony Xperia Sola (MT27I) and has the Stock firmware installed. I'm following the tutorial to unlock the ...
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99 views

HTC One M8 is stuck on bootloader and won't accept “adb * mods”

I have HTC One M8 that has been rooted, but relocked and S-OFF. I have also tried fastboot flash boot boot.img and then I get this message everytime. sending 'boot' <8624 KB> ... FAILED ...
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77 views

how to flash my memopad me170c without droidboot

i try to flash my device but fast boot recovery bricked now i cant open droid boot or android Os. when i try to power on device an USB logo show in the screen and device powered off in 1 second. in my ...
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0answers
33 views

device not loading into bootloader

I am trying to boot my rooted android device into bootloader to unlock it. I have tried following commands but none is working. adb reboot-bootloader adb reboot bootloader Even when trying to ...
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153 views

Fastboot Commands Via Update.zip To Unlock Pattern Lock on Asus Transformer FT201

I purchased an Asus Transformer Prime TF201 a couple years ago. I added a pattern lock on this tablet so our kids would not use it all the time. One of them decied to try the pattern too many times. ...
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183 views

Update and then root Infocus M512. Device Found but is offline. Can't enter Fastboot

I am having a really frustrating time updating the firmware on an Infocus M512 as a prelude to then rooting it. I am using the (flawed but usable) how to at this site, ...
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25 views

How to unbrick Nexus 4 after flashing compiled Android?

Today I compiled Android from source as explained following Google's instructions starting at https://source.android.com/source/initializing.html. After flashing the compiled image onto the device ...
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100 views

Get HTC Desire HD into recovery / fastboot / adb with dead volume keys

So my friend tried installing a custom rom on his phone resulting in bricking it. He gave it to me to try to fix it. The phone is a HTC Desire HD with physically broken volume buttons, so I can't get ...
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1answer
72 views

LG - Fastboot doesn't recognize my device

I'm trying to get flash a custom recovery on my LG p760, however when I type fastboot devices in the command prompt (while booted into fastboot mode) nothing shows up. adb devices works fine though. I ...
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1answer
324 views

Can't flash recovery via fastboot

I have a asus tablet TF300T and I am trying to flash CM11 rom. I am following procedure from official CM pages http://wiki.cyanogenmod.org/w/Install_CM_for_tf300t, but I am stuck with flashing custom ...
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191 views

Mac OS X fastboot is just waiting (HTC M8 T-Mobile)

I'm trying to run fastboot oem get_identifier_token on Mac OS X Yosemite but I get stuck on "< waiting for device >": ➜ platform-tools ./adb devices * daemon not running. starting it now on port ...
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31 views

Fastboot cannot flash recovery partition [duplicate]

I recently tried to upload a recovery to my Tracer Oxygen GS 3, but now it starts up, shows the Tracer logo and reboots the phone. I can enter into fastboot and flash system, chache, boot, and ...
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213 views

Nexus 7 (2013) stuck on Google logo after manual flash of Lollipop

A few weeks ago, before the OTA release of Lollilpop for my Nexus 7, I booted into fastboot mode and manually flashed the razor factory images for Android 5.0. Everything worked fine until the N7 ...
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45 views

Flashed system partition differs subtly from system.img

When I flash my Nexus 7 2013 with a rebuilt aosp system.img using fastboot, the data in the partition (as read back by dd) is very slightly different from the system.img data used to flash it. A block ...
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1answer
274 views

Fastboot flash recovery failed in adroid ZTE kis Q. Several methods tried [duplicate]

I'm trying to root my android using adb from a linux distro. When I run fastboot flash recovery recovery-clockwork-5.0.2.0-blade.img I get > sending 'recovery' (3768 KB)... OKAY [ 0.142s] writing ...
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1answer
323 views

Trying to flash CWM but fastboot hangs at “writing 'recovery'…”

I'm trying to flash my Coolpad 8865u (Vodafone Smart 4 Turbo). I unlocked fastboot and fastboot oem device-info confirms this. However when I try to flash CWM the prompt on my shell hangs at "writing ...
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137 views

adb reboot recovery no longer workiing

MY tablet was on bootloop using android sdk adb reboot recovery solved the problem now mY tablet is back on bootloop adb reboot recovery just reboot to bootloop i can not access the recovery menu ...
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86 views

fastboot flash recovery recovery.img

my phone is samsug galaxy s7562 duos it dosn't work and can't boot into normal mode or download mode or recovery mode it just can boot ito fastboot mode iam trying this command fastboot flash boot ...
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268 views

How To Recover From Bootloop after installing fonts, dont have custom recovery and stock rom?

I am using Panasonic T11, it is rooted but do not have custom recovery mode like CWM, My problem is: after installing a custom font my device stucked in bootloop, i have adb, but i dont know how to ...
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1answer
1k views

How to flash root.zip in fastboot

I need to flash the root zip I downloaded from Chainfire without having to install recovery like Clockworkmod. I have fastboot and adb and that's what I used to flash 4.4.4. This is for my Nexus 7 ...
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380 views

Tablet listed under adb devices, but not under lsusb while in recovery

I am working with a Gemini devices GEM1000 tablet, I have performed all the steps to get adb working, and the device shows up under 'adb devices' so I go to the bootloader with 'adb reboot bootloader' ...
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123 views

Can I root karbonn titanium S1 plus with the kingo root app?

I just want to make sure that I can root my karbonn titanium s1 plus with the kingo root app cuz I dont want A bricked phone. Please help. And also, I have asked a question on how to fastboot karbonn ...
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165 views

unlock bootloader Micromax A310

I am trying to unlock bootloader in my Micromax A310. It has MT6592 processor. Whenever I start the mobile in fasboot tmode it got stuck and only shows => FASTBOOT mode ... => FASTBOOT mode ... in ...
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124 views

How to i fastboot karbonn titanium s1 plus

I want to root my android device and for that I have to enter fastboot mode in my karbonn titanium s1 plus. I tried pressing the volume up key and the power key while booting but nothing. It just ...
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334 views

Unlock bootloader for Lenovo A1000-T

How did you go into fastboot mode? I am not able to figure out. adb reboot bootloader adb reboot-bootloader adb reboot fastboot None of them worked, However adb reboot recovery opens it in ...
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143 views

Fastboot doesn't recognize moto g 4g on linux

I have a Moto G 4g. ADB recognizes the cell and I can restart it in fastboot mode, but when I check in the terminal with: fastboot devices Nothing appears, and if I go on with fastboot oem ...