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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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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597 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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32 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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32 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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17 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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0answers
76 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
88 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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68 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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39 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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85 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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32 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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0answers
106 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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1answer
223 views

adb device not found

When I enter ./adb devices I get Device not found. Yet I can successfully unlock my phone via ./fastboot oem unlock. I can't turn on debugging since my phone is stuck in a bootloop and won't start ...
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0answers
81 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 ...
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0answers
87 views

/sdcard not mounted

I have installed a nightly build of Cyanogenmod on my HTC One S. It has a problem that it doesn't have /sdcard (internal storage) mounted, so I can't save any data on the device. Applications install ...
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0answers
19 views

Android: Green bar in bootloader

I tried to run the command fastboot flash recovery recoverym.img using cmd but I've got some problem. First, a green bar (progress about 90%) was shown on the top right corner of my bootloader. ...
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0answers
30 views

Xperia Go: Boot into Recovery Mode [duplicate]

First time messing with Android OS/ROM I have a Sony Xperia Go (ST27i with Android 4.1.2) I aiming to deploy the latest kitkat ROM for this phone ...
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2answers
128 views

does flashing a kernel ever wipe anything on the phone? + Doing it without CWM?

does flashing a kernel ever wipe anything on the phone? and is it ever dependent on android version? e.g. 4.22 or 4.3 I have CWM and i've seen the option to install from zip within CWM recovery. ...
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0answers
68 views

Xperia Miro fastboot wont work

I've been following the official sony's unlockbootloader tutorial and I'm stuck on a problem that I cant seem to fix. To use my unlock code, I have to Turn off the device Connect the usb cable ...
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0answers
17 views

Erase commands aren't working in fastboot [duplicate]

On my Google Nexus 7 (2013) aren't working any erase commands. When I try to execute some of commands: fastboot erase userdata fastboot erase cache ... it hangs on and nothing happens. If it is ...
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546 views

adb/fastboot can't find device in bootloader, but they can do it when booted

I have worked on building Android from source code for few weeks. It used to be fine to me with my Galaxy Nexus, I can connect to my device via adb and fastboot and flash either the factory ROM or ROM ...
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635 views

Blank screen after logo

I was trying to install a custom ROM in a THL T11 from needrom.com. I managed to get into the recovery mode and wipe cache. However, I got somehow into the «ADB» menu and couldn't get out. I pulled ...
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87 views

Android hangs on boot image after changing boot image

I changed the bootimage of an Android device and it bricked. It's freezing at the boot image. I try to install a ROM using fastboot but I have a permission error. I try to connect with adb but I ...
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1answer
229 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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302 views

Fastboot command returns a list of question marks

I am trying to root an Acer Iconia Tab A200 tablet using a script. I have adb working and fastboot works too, however, command fastboot devices returns a list of question marks. Eg: ???????????? ...
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193 views

can I use SP_Flash_Tool on Alcatel V860

is it possible to flash Vodafone Smart 2 with SP_Flash_Tool? and if not is there any other tool that will allow me to? since I can't use Recovery Mode nor Download(fastboot) Mode I accidentally ...
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1answer
425 views

Enable bootloader screen for Lenovo Vibe Z

I pressed and held volume up key for sometime and my Lenovo Vibe Z is seems to be bricked (not charging or switching on). I would like to get into to the boot-loader screen to factory reset the ...
0
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1answer
487 views

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 ...
0
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1answer
289 views

Unable to flash recovery image into the device

I am trying to flash recovery image into my HTC Explorer phone. The issue is i keep getting waiting for devices message when issuing fastboot command. the CMD is running with administrative rights ...
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1answer
40 views

GNex factory reset apparently doesn't write anything and I'm not able to update

my gnex (maguro) started rebooting frequently (like every 30 seconds). I hope is not an hardware fault and now I'm trying to restore a factory image so I can rule out any custom rom-derived problems. ...
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2k views

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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1answer
940 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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0answers
227 views

how to change boot logo without using fastboot

I know how to change the boot logo(logo.bin) from fastboot, but the problem is how can I change the boot logo without using fastboot. I can't go to fastboot mode because I think my device(ME-702) ...
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0answers
271 views

fastboot not finding SPH-L720 on Linux

This is with Ubuntu 13.10 on the host and a Sprint Samsung Galaxy S4 SPH-L720. When in normal mode, 'adb devices' finds my phone. I do 'adb reboot bootloader' to reboot my phone into bootloader ...
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1k views

Acer Iconia Bricked with reboot loop after root attempt

I attempted to root my Acer Iconia B1-A71 tablet and ended up bricking it because of not installing the partition fix apk (Bad tutorial). The tablet is currently in a reboot loop and I've tried so ...
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0answers
110 views

nexus s in bootloader mode does not appear in lsusb

I have a Nexus S, and I'm trying to root it. The bootloader is already unlocked. (I got it from a friend, he unlocked it so I don't know any details on how that was done.) When I start it and plug it ...
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0answers
3k views

Enable USB debugging on Motorola Droid Razr Maxx HD Global with no screen

Before this gets marked as a duplicate please consider that virtually every answer involves vague references to things like 'fastboot' that I honestly don't understand and can't find any information ...
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0answers
707 views

fastboot oem writecid 11111111 not working

I have HTC One S with unlocked bootloader and rooted. hboot: 2.15 radio: 1.13.50.05.31 cm10.1.3 installed I currently have S-ON and want to make it S-OFF. I'm trying to achieve SuperCID and I ...
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1answer
2k views

adb can find device but fastboot cannot

Context I can run adb commands on my Nexus 4 and they work fine but when my device is in the bootloader and I try to list the device with, fastboot devices my device is not listed. I was having ...
0
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1answer
152 views

How did can I find important partions of any android devices?

Please Help Me !!! How did can I find important partions of any android device . Using adb or fastboot . Such as, boot, recovery, etc... I mean to backup any androdi device rom . I have tried with ...
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0answers
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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0answers
323 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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1answer
990 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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3answers
3k views

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
93 views

Booting custom rom instead of flashing [closed]

i want to backup my stock partitions from an unlocked device (s-on), tried different things (dd with adb, pushing su-binary with adb, booting custom recovery with fastboot) but nothing worked for ...
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2answers
1k views

Bricked Vodafone smart 2 (Alcatel V860)

I accidentally erased boot and bootloader. download mode nor recovery works and my pc recognize it like Broadcom USB. Any solution?