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39 votes
Accepted

How can I reboot into recovery from fastboot?

(Self answering here because I only found this answer after hours of dredging through 200 page threads of forum posts.) There are two non-standard but semi-prevalent methods that may work depending ...
Caleb's user avatar
  • 1,964
24 votes

Can fastboot be used to backup device?

We can temporarily load a custom recovery fastboot boot <kernel> [<ramdisk>] then backup system partitions.
duing's user avatar
  • 241
22 votes

Flashing Nexus 5 factory image fails on writing userdata

I encounter the same problem today :) flash-all script failed when writing userdata I have managed to solve this issue by manually continue the flashing process: 1) extract image-hammerhead-m4b30z....
kover's user avatar
  • 321
21 votes

Windows 10 Fastboot Driver

By looking at the inf file, you can find that it tells to use the WinUSB driver. So there is a better solution than disabling driver signature enforcement, you can use the tool Zadig (http://zadig....
u7227's user avatar
  • 356
14 votes

Fastboot on Samsung devices

Simple... Samsung devices do not support fastboot, you use Odin or Heimdall to flash what you need.
acejavelin's user avatar
  • 6,197
14 votes
Accepted

Why can't I write to recovery using fastboot on A/B device?

That's expected. Devices with A/B partition scheme don't have a recovery partition. You can only boot in recovery mode with fastboot boot twrp.img. But to permanently flash recovery to device which ...
Irfan Latif's user avatar
  • 20.7k
12 votes
Accepted

What fastboot erase actually does?

This thread on XDA has a post ....what is the aim of the "fastboot erase modemst" command? Answer modemst1 and modemst2 are storage partitions for Radio Firmware .... - and it's obviously a ...
beeshyams's user avatar
  • 41.1k
10 votes

Cannot flash Moto X Style - Due to "Pre-flash validation failed" error

To answer your question specifically: In Moto devices, Preflash Validation Error means the factory image you are attempting to flash is older than the one you have currently installed and Moto devices ...
acejavelin's user avatar
  • 6,197
9 votes

fastboot doesn't see device

Issue: adb and fastboot modes for the same Android device are recognized as separate devices under Windows Scenario: the device is visible with adb devices but is not detected with fastboot devices ...
user2021355's user avatar
9 votes

fastboot set_active command does not exist

First you need the actual fastboot, e.g. 1.4.3 (from link in the other answer). Then the correct command is: fastboot --set-active=a or: fastboot --set-active=b In the help (fastboot help) you can ...
franc's user avatar
  • 417
8 votes
Accepted

Unable to run fastboot commands: < waiting for device >

You probably don't have USB drivers installed. Download them and install, everything should work now. Download them from here Download Galaxy Nexus drivers here Power on the device Go to Settings > ...
esQmo_'s user avatar
  • 3,237
8 votes
Accepted

Booting kernel from fastboot

When you use fastboot boot FILE.img, the image is downloaded and written into the RAM and than the normal procedure to boot a boot.img is followed. No changes to any partition takes place. If the ...
Firelord's user avatar
  • 25.2k
7 votes
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OPO stuck in "Erasing..." while unlocking bootloader

Just reboot the device; at this point there's no harm that can be done since the data was being wiped anyways.
Matthew Read's user avatar
  • 50.6k
7 votes
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How to solve Android 7.1 flash failure with remote data too large?

Turns out that some old adb tooling was in my PATH variable, so I was using an old version of fastboot.. It all worked well when I used the right version! Will accept this as an answer in 2 days.
Michel's user avatar
  • 191
7 votes
Accepted

How to take full image backup of partitions or eMMC?

Yes you can boot in TWRP if bootloader is unlocked: fastboot boot /path/to/twrp.img Then you can simply dd whole eMMC or individual partitions. You need some extra memory (on external SD card) to ...
Irfan Latif's user avatar
  • 20.7k
7 votes

"Fastboot devices" command doesn't work after macos high sierra 10.14.4 upgrade

This might be a regression in android-platform-tools. Try fastboot version 9dc0875966c0-android from android-platform-tools 26.0.1 as it works for me on macOS 10.14.4
mbi's user avatar
  • 171
6 votes

How to check if your bootloader is unlocked

i'm no expert, but if you go to the bootloader, by (on my nexus 4) holding volume down then power up, then it says
barlop's user avatar
  • 635
5 votes
Accepted

What are the implications of doing fastboot erase modemst1?

I ended up taking the risk after all other "fix GPS" methods failed and I can report that it was successful and to my knowledge had no side effects, like the ones reported with other devices.
Superpelican's user avatar
5 votes

How to run adb and fastboot commands from Termux?

This question is nearly a duplicate of this which has a detailed answer by @Firelord, except the Termux part. As mention by @DeathMaskSalesman in comment, Termux is more like a Linux environment, but ...
Irfan Latif's user avatar
  • 20.7k
5 votes
Accepted

Huawei bootloader: what is "FB Lock" and how to unlock it?

There are two types of bootloader locks in Huawei devices: FB Lock and USER Lock. USER Lock restricts the standard partitions like system, data, recovery, kernel etc, but not the critical bootloader-...
Supersonic's user avatar
  • 1,225
5 votes
Accepted

How to install a firmware without losing your data and restore the previous one in case it goes wrong?

1) You can boot into TWRP recovery from fastboot fastboot boot twrp.img 2) Then you can backup your whole emmc from adb adb pull /dev/block/mmcblk0 Does /dev/block/mmcblk0 include my internal ...
alecxs's user avatar
  • 4,074
4 votes
Accepted

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

Yeah, I had the same error. The US XT1644 variant can't use the boot.img for the XT1643 and below. I was able to root by installing SuperSU. Run this command: fastboot boot twrp-3.0.2-0-athene.img ...
jack's user avatar
  • 56
4 votes
Accepted

Fastboot - what to install on Windows Desktop?

Driver: Motorola End User Driver Installation - choose 64-bit. Fastboot binary: Minimal ADB and Fastboot - Google now does have an "official" package, but it's unintuitive to install and use, so this ...
Andy Yan's user avatar
  • 9,539
4 votes
Accepted

Enabling ADB on Nexus 6 with dead screen

I followed this guide I went into fastboot mode by holding down the power button (force restart) and the volume down key (recovery mode) I downloaded a twrop image from: https://dl.twrp.me/shamu/ ...
TAAPSogeking's user avatar
4 votes
Accepted

Install TWRP on Samsung Note 10.1

Note 10.1 (2014) has its bootloader unlocked by default, just like most if not all devices annouced pre-Lollipop. Under Windows, the actual installation is as simple as described in the TWRP device ...
Andy Yan's user avatar
  • 9,539
4 votes

Xiaomi Mi Unlock "Not connected to the phone"

I had the same problem, figured it out eventually. Just extract the Mi unlock tool files into a new folder directly in the C Drive. Hope this helps.
Sachin Murugan's user avatar
4 votes

How to determine if the bootloader is locked

There's no fastboot for Samsung devices - Download mode is the semi-equivalent, except that it's only accessible via Odin/Heimdall. You will need appropriate drivers to get the PC to recognize a ...
Andy Yan's user avatar
  • 9,539
4 votes
Accepted

fastboot: usage: no command

Use fastboot --help instead. This is a kinda standard way to get usage help in Linux world. However sometimes writing only the command name also works as you expect. Reference: if (argc == 0) { ...
Irfan Latif's user avatar
  • 20.7k
4 votes
Accepted

Cannot flash twrp-3.2.3-0-cedric.img (Motorola Moto G5) ("Image not signed or corrupt")

The locked bootloader doesn’t let unsigned images to be flashed. So, the Image not signed... error indicates that there is a possibility of the bootloader not being unlocked. Make sure the bootloader ...
Irfan Latif's user avatar
  • 20.7k
4 votes
Accepted

"Fastboot devices" command doesn't work after macos high sierra 10.14.4 upgrade

I had the same error in version 28.0.3 but it's fixed in 29.0.1. You can download it from the official site. It's also available from MacPorts, e.g port install android-platform-tools
Elliott B's user avatar
  • 156

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