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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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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3answers
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Fastboot permission denied error in Asus Zenfone 2

I went into regular recovery mode to wipe cache and do factory reset to flash clean Asus ROM from XDA. I first went to wipe cache and it felt like it was taking way too long, so I turned off the phone ...
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SOLVED No Matter What I Do, My Nexus 5 Will not appear in adb devices while in fastboot mode

I was recently given a locked nexus 5. Every android phone I get I mess with so I know a decent amount. As usual, I decided to root it, and maybe install a ROM, since many are available for this phone,...
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ADB device unauthorized, cant get RSA Fingerprint

So I was messing around with my Dell Venue 10 5050, trying to root it. I booted to the bootloader and tried to unlock it. I formatted the system,recovery, and data partitions, which deleted Android OS....
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514 views

Device freezes after trying to reboot with bootloader

I have been trying to unlock my bootloader as per the instructions found here. I already have installed the drivers from Google USB driver folder that comes in Android SDK "extras" folder. However, ...
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1answer
30 views

ADB detects but, fastboot does not detect device in windows 10

I am trying to root my phone. I have flashed TWRP recovery from here using Odin. I have installed Android Studio for Android SDK. The command adb devices shows the device connected but fastboot ...
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13 views

Unable to unlock boot-loader Micromax Canvas A1 AQ4501

i follow all process to fastboot oem unlock using cmd but unable to unlock i install adb drives and follow all instruction from many website but bootloader not unlock when i enter "fastboot oem unlock"...
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1answer
403 views

Fail to install CM13 on Oppo Find 7a

I would like to install Cyanogenmod 13 on my Oppo Find 7a. I am following the instructions from CM wiki. I am using a laptop with Linux (LMDE2). I fail to install a TWRP recovery. Fastboot seems to ...
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1answer
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Writing 'partition' Failed (remote failure) error, when flashing from fastboot

A couple of days ago, I got an error on my phone (Motorola Razr HD xt925) saying that it cannot load the home screen. So, I restarted it in order to resolve the issue. However, it didn't reboot and ...
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0answers
18 views

LG G3 (D855) Fastboot Problems

So I'm trying to see if my bootloader is locked because for some reason when I flashed a "bump'd" TWRP recovery, it came back with some brief certificate failure kind of thing (sorry it was only ...
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1answer
2k 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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16 views

What does bootloader board_version variable mean?

I was following a procedure a friend gave me, which involved using Mi Flash tool to flash Xiaomi Mi4 WCMDA (cancro) with some Chinese ROM. A friend bought exact same product from the same vendor and ...
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1answer
187 views

Error when flashing recovery to Moto G4 Plus Xt1640 - Image not signed or corrupt

I recently bought a new android phone (Moto g4 plus). Coming from the iPhone, I was eager to root it and take advantage of all the features. The problem is that whenever I try to flash a recovery ...
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1answer
24 views

Can access Fastboot, but it isn't working. Software issue?

First of all, thanks for taking the time to read this. I know it's a long post, I'm just trying to be as detailed as possible. I've a Moto G XT-1032 that stopped working a couple days ago. It has ...
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36 views

Error “FAILED (data transfer failure (Value too large for defined data type))” While Flashing Nexus 4

I have a Nexus 4 that was soft bricked during an OTA update. I have tried to flash several factory images to it and every time it gave me the error "FAILED (data transfer failure (Value too large for ...
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1answer
10k views

Booting into TWRP fails

I have a Motorola Moto G 2014 XT1068 (Titan) with an unlocked bootloader. I am running the stock ROM, recovery, kernel, etc. for my device and my device is not rooted. After I download the latest TWRP ...
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1answer
124 views

Data recovery from android device with broken screen

Situation Summary - I have an Android device with a broken screen, LCD and touch I have an android phone (BQ Aquaris E4.5 Ubuntu Edition, which I have flashed with the Android firmware for the E4.5 - ...
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1answer
5k views

Fastboot oem get_identifier_token - FAILED (remote: unknown command)

Hello Everyone! I am trying yo unlock the bootloader with no success. Basically, the following command Code: Fastboot oem get_identifier_token is hitting the error of: FAILED (remote: unknown ...
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ZTE Blade G - fastboot and recovery no effect

I have problem with flashing, erasing new partition and wiping userdata. My installed rom is all time crashing and when I try to wipe all data (factory reset) in recovery, recovery says it's done, but ...
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1answer
24 views

Why can't fastboot see my device?

I have a 5" android tablet running on an Allwinner A33 chip referred to in device info as "astar_evb-eng". I am running Windows 8 (not 8.1) and have installed and tried every version of the ADB and ...
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1answer
13 views

Phone (Moto G) stuck in fastboot screen. Nothing works!

Stuck at this screen I am on a Mac OS and was intending to unlock the bootloader when I accidentally bricked my phone. I followed all instructions. Downloaded Motorola drivers, Android SDK and also ...
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2answers
59 views

phone won't boot and won't enter recovery, even after reflashing TWRP

I have a Xiaomi Redmi 2 phone on which I installed Cyanogenmod. So, after upgrading manually, the phone won't boot anymore (neither into recovery nor into the system). Only fastboot works. (Probably ...
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1answer
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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67 views

Unlocking phone: Fastboot command

I am trying to unlock the bootloader of my phone (Archos 50b Oxygen) using Ubuntu 14.04. But nothing happend when i launch the unlocking command. Here a few commands and their results: adb devices ...
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1answer
38 views

fastboot responds, except that it won't flash my recovery image

I have installed Cyanogenmod (v13) on a Xiaomi Redmi 2 phone. So, it all worked, but then I tried a manual update. I booted into recovery (TWRP), and flashed the new cyanogenmod ZIP file; then flashed ...
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2answers
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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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0answers
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Recover user data from Nexus 5

My Nexus 5 shut itself off today and can't be booted anymore. I can occasionally get into fastboot, but if I try to launch recovery or boot normally, the phone shuts off or restarts before the Android ...
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20 views

How to release unknown wakelocks using Fastboot or ADB?

Under Battery History, it can be seen that the device is always 'Awake' due to some or the other app using WakeLock. So how to identify and release a specific/all unknown wake lock(s)?
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1answer
76 views

Unbricking a phone without being able to access recovery

I have rooted my Zenfone 2 ZE551ML using a method which permanently replaces recovery (I didn't realize it back then). Can I unbrick it using only fastboot? I can't use adb, as I can't open recovery. ...
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16 views

Stuck in fastboot after trying to root Moto G2 XT1033

Everytime I try to boot is giving me the message ending up at fastboot with message: Fastboot Reason: Fall-through from normal boot mode I already tried to reset to factory but all the options ...
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How to check if your bootloader is unlocked

I'm about to flash a custom recovery, but I'm not sure if my bootloader is unlocked or not (phone is rooted, but I did it a while ago, so I can't remember the process I went with), and I don't want to ...
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19 views

Fastboot not flashing/erasing recovery

I am trying to fix my phone (LG G2, Lollipop 5.0.2) by reflashing a recovery (the old one was corrupted). I've managed to get into Fastboot however I cannot flash / erase it; this is the output: # ...
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1answer
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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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1answer
1k 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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Not able to flash android N preview system.img in Nexus 6P

Not able to flash android N preview system.img in Nexus 6P Android N preview (Nexus 6P "angler") Build : angler-npd56n-factory-1ce5ccad.tgz fastboot flash bootloader bootloader-angler-angler--03....
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Is there a way to execute a comparable version of fastboot erase on an Android phone?

The GPS doesn't work on my Moto G since I flashed CM 12.1 on it. According to https://wiki.cyanogenmod.org/w/Known_Issues_page_for_falcon, it is possible to 'fix' the problem by erasing certain ...
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1answer
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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
31 views

How can i activate, if it's possible, usb debug mode from fastboot in a 3rd gen moto g?

It is basically dad, it's possible from fastboot mode to activate de usb debug mode, and if it is, how can i?
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2answers
583 views

What are the implications of doing fastboot erase modemst1?

I installed a Cyanogenmod 12.1 snapshot on my Moto G 2014 when I got it, it previously has only had the stock ROM installed, no other custom ROMs. I soon discovered that the GPS wasn't working on ...
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0answers
57 views

Resurrect one Huawei Ascend P7

I have the Huawei Ascend P7, was using Android 4.4.2, so I decided to update the phone, I followed a tutorial that taught me to do the BACKUP using Huawei app, and then selected the update file in the ...
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0answers
66 views

adb reboot bootloader just restarts on my LG G4

I'm trying to install the latest version of TWRP for my LG G4, but whenever I type in adb reboot bootloader into the command window, my phone restarts totally normally. From what I can tell by google,...
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1answer
39 views

Couldn't acquire root after running superboot

I've already done all steps for getting root at my MotoG (2nd generation) but still can't acquire the privilege. Unlocked bootloader: Started developer mode + USB debug Ran fastboot oem unlock ...
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HTC ONE (M9) - S-OFF sunshine & cyanogenmod

Ok guys i'm in a real problem! I cannot make or receive phone calls for one week... it all started when I got bored with the original OS of the HTC One M9, so I rooted the phone and installed CM13 ...
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54 views

How to boot from microsd, fix the bootloader and reinstall the android on ASUS MemoPad ME302C?

I have accidentally flashed a wrong image for fastboot update and now when I start my tablet in any kind of mode (normal, recovery or charging) I always fall into a bootloop: First the Intel icon ...
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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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8answers
161k 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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0answers
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fastboot flash boot boot.img : hab check on boot

I unpacked and repacked boot.img and tried 'fastboot boot new_boot.img' . The device came up properly. I thought everything was okay and decided to install the image. When I did 'fastboot flash boot ...
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6answers
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ADB can discover devices but not fastboot

I've searched on the web about this problem and it's usually solved by installing the appropriate drivers. Problem is I'm on a Mac. When I plug in my device, it can be discovered when I run adb ...
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0answers
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Volume Up button does not respond while unlocking bootloader

I have an InFocus M260 (MediaTek MT6582 based). It has a locked bootloader and whenever i try to unlock the bootloader, this shows up : fastboot -i 0x0489 oem unlock in the device it shows ...
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58 views

How do I recover data from an encrypted phone which will not boot and which is 'oem locked'?

My OnePlus2 phone keeps rebooting and won't give me access to the Android OS after a recent update. I now want to recover my encrypted data and reinstall the OS. After reading around on the web I ...