adb problem pc drivers? - Android Q&A, Help & Troubleshooting

hello guys.im trying to unlock bootloader of my phone sm-j710f via adb but when i try to fastboot i get waiting for device error.i have searched on internet and i saw that it is a driver problem but when i boot into bootloader my phone isnt shown in the device manager of pc while it makes the sound of connected device.any suggestions?or another way to unlock bootloader?(cant install twrp for a mysterious reason)

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Used ADB to unlock bootloader but now ADB can't "see" the phone in download mode

Used ADB to unlock bootloader but now ADB can't "see" the phone in download mode
I have a Windows 7 PC and I used that with Android SDK to unlock the bootloader and that worked. Now (trying to install recovery) I can put the phone (5.1.1) in download mode and the PC registers the phone in Device Manager but ADB doesn't see it. I've changed nothing with the PC since unlocking the bootloader and I've confirmed USB debugging is enabled on the phone but the command 'adb devices' lists nothing below 'List of Devices Attached'. Has anyone heard of this? Any troubleshooting suggestions?
Try go to device manage and look for a device with a strange name using the Android ADB device driver, choose update and look for a driver for LGE ADB device instead.
I did t think think adb works in download mode, and it sure won't work in bootloader
If you are on lollipop then use fastboot to flash TWRP
fastboot flash recovery nameofrecovery.img
Sent from my LG-H901 using XDA-Developers mobile app

Windows doesn't detect my fastboot device.

Hello everyone, I'm using Redmi Note 3 and I have tried rooting it several times.
I have unlocked the bootloader. I have also installed the adb drivers.
When I connect phone in fastboot mode and write 'fastboot devices' in cmd it doesn't return anything. But when I connect when its on, adb devices returns the device code.
Please help.
Same, happens to mine too. Used to work with a previous install of windows, but now, nope.
Had this issue too.
Try going to Device Manager and check to see if Kedacom USB Device shows up. Under which, Android Bootloader Interface should be present. Install minimalist ADB and fastboot and right click Android Bootloader Interface. Click Update Driver Software, browse computer, and then click the option to list driver files already present on your drive. It should pull up a fastboot driver that's an older version than the one you currently have. Install that and fastboot will work again.
Doesn't work
Can you please link the files for download when we're updating the driver software.

BLU VIVO 6 can't find fastboot device

I recently got a BLU VIVO 6 and i just want to unlock the bootloader(and then install TWRP and root it etc).
the phone is recognised with ADB Devices, but once i put my phone into fastboot mode ( and type into prompt fastboot devices ) nothing comes up.
OEM unlocking is on
I've swapped out USB ports
I bought a new USB cable for the phone
Reinstalled drivers, manually.
halp, what do
:crying: :crying::crying:
Try a diffferent computer or uninstall all the drivers and reinstall only the ones that are needed. Most probably its a problem with Drivers.
It was, thank you. I was able to unlock the bootloader, now my issue is with TWRP. the phone is softbricked at the moment, and has been for a few day. I going to keep trying to find out how to get it working again.
Do you have the recovery file you want to install? If so just flash it from fastboot. Otherwise find the recovery in the forum of your device.
Hit thanks if it helped!

Help device doesn't show in ADB (bootloader unlocked)

At first, I installed the Windows 10 drivers and the first time I put my phone in Fastboot & Rescue mode it showed up on the ADB and I could unlock the bootloader, then I wanted to install TWRP but now the device doesn't show up anymore in the bootloader mode... Any ideas? I also tried Ubuntu with no success But I can clearly see it in the device manager.
What does the command "fastboot devices", when in fastboot obviously, return?
Estatus del problema
Hi i have the same problem can you to resolve it???
m4xxi said:
At first, I installed the Windows 10 drivers and the first time I put my phone in Fastboot & Rescue mode it showed up on the ADB and I could unlock the bootloader, then I wanted to install TWRP but now the device doesn't show up anymore in the bootloader mode... Any ideas? I also tried Ubuntu with no success But I can clearly see it in the device manager.
Click to expand...
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Fastboot Not Sending Flash Commands

Hello, currently trying to flash TRWP in my Asus Zenfone Max Pro M1. Already unlocked the bootloader and everything but ive just hit a brick wall. The fastboot console recognizes my phone when i type fastboot devices, but when i send the command to flash the recovery nothing happens, the CMD just stops responding as if is loading something but i have waited for about 1 hour and nothing happens, can someone please shine me a light on this problem? Thank you in advance .
Hi , did you bricked your device or what is going on ?
If the problem is just fastboot terminal then reinstall your drivers and disable driver signature , also use USB deview aplication to uninstall hidden drivers for your device : https://www.nirsoft.net/utils/usb_devices_view.html
Another way is to install this version of minimal adb and fastboot:
https://androidfilehost.com/?fid=745425885120698566

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