[Q] Fastboot - Android Q&A, Help & Troubleshooting

Hi,
When I try to reboot on fastboot mode using adb command : adb reboot bootloader, it doesnt work.
Does anyone know how to make fastboot working ?
Thank you

Related

ADB commands

my phone is on 1.53, s-off and unlocked. im trying to relock it, but its not responding to adb commands. i reboot into fastboot and it shows fastboot usb, but when i type in any commands it just gets stuck at waiting for device.
any ideas?
What command are you using?
ADB commands works in booted android.
Fastboot commands works in fastboot-USB mode.
To relock the bootloader, type "fastboot oem lock"
mnomaanw said:
What command are you using?
ADB commands works in booted android.
Fastboot commands works in fastboot-USB mode.
To relock the bootloader, type "fastboot oem lock"
Click to expand...
Click to collapse
so im in fastboot usb mode. i typed in fastboot devices and its blank.
i do remeber typing adb reboot bootloader when the phone was booted and it rebooted into bootloader mode fine.
i pulled the rom.zip from ruu and renamed it pg86img.zip. did the update and its still saying unlocked??
debug mode is active. but adb devices doesnt want to detect the device. any ideas what's wrong?

Fastboot doesn´t recognize my device

I can use adb commands no problem, but with the phone being in fastboot, fastboot commands like
Code:
fastboot devices
don´t show anything.
I want to unlock the bootloader but I am stuck with
Code:
waiting for device
after the
Code:
fastboot flashing unlock
command.
Why is it that every time I try to follow a tutorial, I do the exact same things and it doesn´t work for me?
Anyways, I installed all drivers from here and Device Manager shows an Android ADB Interface with a yellow triangle when I connect my phone in fastboot mode.

ZTE Z5031O refuses to go into bootloader mode

So i'm trying to get the bootloader unlocked so i can begin to mess with the device but it just doesn't want to go into the bootloader. It goes into recovery fine and i've tried going in there that way but it doesn't work. It just boots up android. Here's what i typed into my prompt.
adb devices
adb reboot bootloader
fastboot devices
adb reboot-bootloader
fastboot devices
adb reboot recovery
fastboot devices
Thank you in advance for trying to help

I can't boot the device to fastboot mode ?

I used adb commands and also tried to boot into fastboot mode manually but neither works! Any idea guys ?
what the fish -_-
Unlock your bootloader first.

Lg velvet 900um1

I cannot get adb to recognize my device in download mode. I have installed all the necessary drivers, got usb debugging enabled and even switched out cables. If anybody has a solution to this it would be greatly appreciated. I'm trying to falsh a boot img with magisk to root my device, but download mode is not recognized.
ADB doesn't work in Fastboot ( AKA Download and/or Bootloader ) mode: you have to use
Code:
fastboot devices
fastboot <FASTBOOT-SUBCOMMAND-HERE>
jwoegerbauer said:
ADB doesn't work in Fastboot ( AKA Download and/or Bootloader ) mode: you have to use
Code:
fastboot devices
fastboot <FASTBOOT-SUBCOMMAND-HERE>
Click to expand...
Click to collapse
unfortunately the fastboot command ain't working either. everything works fine when the phone is on it's just when I enter download mode it ain't recognized
Cat_tails said:
unfortunately the fastboot command ain't working either. everything works fine when the phone is on it's just when I enter download mode it ain't recognized
Click to expand...
Click to collapse
Why you enter the download mode - that is LAF mode - at all?
Normally there is no adb nor fastboot in that mode...

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