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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How to detect if bootloader is unlocked when fastboot doesn't work?

I have this tablet that runs on RK3168 (Rockchip) SoC. The problem is that fastboot doesn't recognize the device, but after so much toil, I managed to find Finless' flashing tool and flashed CM ...
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109 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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300 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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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
81 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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114 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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108 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
243 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 ...
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1answer
237 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 ...
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1answer
161 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
35 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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1k 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
409 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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190 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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221 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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732 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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96 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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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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593 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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63 views

Can I check if the fastboot has worked if my phone screen is broken?

My screen is broken on my old HTC Desire Z and I want to recycle - but before I do I want to clear all the data that was on the phone. I followed the instructions for a fastboot and the phone did make ...
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1answer
1k 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 ...
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1answer
128 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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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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272 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
908 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
2k 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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2answers
655 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?