"Unkown device" on bootloader mode for both J4+ and J4 core - Samsung Galaxy J4+ Questions & Answers

I turned USB debugging and OEM on, installed ADB drivers on my computer and plugged my J4 core (J410F). The "adb devices" command shows that my device is recognized by ADB, and I can reach my files problemless. But when I reboot into bootloader (adb reboot-bootloader) My device appears to be "unknown device". It's literally same problem in this thread: https://forum.xda-developers.com/showthread.php?t=2182437
To summarize: Adb recognized my device, can command my device, PC also recognized my device, can explore the files, but fastboot and Odin can't.
I also tried it with J4+, same problem occured. Tried to use another computer and swapped from windows 10 to windows 7, same problem occured. Dealing with this problem for 3 days, I'm about to give up.
My both devices are Turkey versions. Could that be the problem? , is something is broken on Turkish kernels?
I want to be able to use bootloader so I can root my device or be able to recover it when neccessary. Since some other users had same problem, it might be an universal problem, and since both devices are Turkish variations, it might be the problem of Samsung Developers, so primarily to the Samsung developers, after all developers, I'm asking for your help.

anonimazu said:
I turned USB debugging and OEM on, installed ADB drivers on my computer and plugged my J4 core (J410F). The "adb devices" command shows that my device is recognized by ADB, and I can reach my files problemless. But when I reboot into bootloader (adb reboot-bootloader) My device appears to be "unknown device". It's literally same problem in this thread: https://forum.xda-developers.com/showthread.php?t=2182437
To summarize: Adb recognized my device, can command my device, PC also recognized my device, can explore the files, but fastboot and Odin can't.
I also tried it with J4+, same problem occured. Tried to use another computer and swapped from windows 10 to windows 7, same problem occured. Dealing with this problem for 3 days, I'm about to give up.
My both devices are Turkey versions. Could that be the problem? , is something is broken on Turkish kernels?
I want to be able to use bootloader so I can root my device or be able to recover it when neccessary. Since some other users had same problem, it might be an universal problem, and since both devices are Turkish variations, it might be the problem of Samsung Developers, so primarily to the Samsung developers, after all developers, I'm asking for your help.
Click to expand...
Click to collapse
Not sure what you expected?
ADB requires the adb binary to be run at boot via the kernel ramdisk.
Neither FASTBOOT(which isn't supported on Samsung devices) nor ODIN(download mode) run the kernel.
In short ADB does not function in download mode.

Related

Usb drivers for your android phone

USB Drivers are let your PC communicate with your device.
If you are executing some ADB Commands, you will need USB Drivers installed which will let the ADB server on your PC communicate with the ADB client on your device. If there are no USB Drivers installed on your PC, you will not be able to perform activities on your device via the PC.
First of All I would recommend you to install Universal ADB Driver Installer.The Universal ADB Driver installer detects your phone and installs the ADB drivers for it.This tool developed by drsmart is your solution to the “device not found” error you might get on executing ADB commands.
Universal ADB Driver Installer Download Link - http://adbdriver.com/downloads/
USB DRIVERS
1.SAMSUNG:
--- http://www.samsung.com/us/support/downloads
2.LG
---http://www.lg.com/us/support/mobile-support
3.HTC
---https://support.htc.com/en
4.SONY
---http://developer.sonymobile.com/downloads/drivers/
5.ASUS
---http://support.asus.com/download/options.aspx?SLanguage=en&type=1
6.MOTOROLA
---http://www.motorola.com/sites/motodev/us-en/motodev_lp.html
MORE DEVICES WILL BE UPDATED
Thanks for the info. I tried the univ adb driver installer but it showed I already had the right driver installed. Windows explorer can see my phone but other apps like HTC Sync or myphoneexplorer can't. This only happened after I rooted & installed a new rom. Maybe the rom is faulty...
I want Google nexus driver
any one can help me ?
mt6572 driver
Please add driver for mt6572 device
thx. very usefull!
thanks for the updated links.
Gole Maryam said:
I want Google nexus driver
any one can help me ?
Click to expand...
Click to collapse
an universal driver for all Nexus Devices (Phones and Tablets) can be found here:
http://forum.xda-developers.com/showthread.php?t=2513339
No access to USB debug
I give up and need some professional help...Ya both kinds.
Here we go, I have the Galaxy 3 d2att I747
Rooted
I was running CM 10.2 with latest nightly, I think 20131208 and decided to update to CM11 via my Cyanogenmod updater but before I did I had read somewhere I should change from CWM recovery to TWRP so I downloaded Goomanager and updated to the TWRP version for my phone then went for the KitKat update and thats when the trouble began.
I am now stuck in a boot loop even if I try to boot into TWRP all I get is the TWRP boot logo then straight into boot loop again. I am almost positive I did a factory wipe as well as cache/dalvik.
Not being able to use TWRP to get into recovery I thought I would just use Odin but I can't get any of my laptops to recognize the phones USB, I just get the windows usb driver error and have tried to install the drivers manually via device manager using my samsung 7 chronos with windows 8.1 and my acer with windows 7. I updated drivers using Samsung Kies and from the website, no luck.
I also ventured into an area that I have no expertise in but I guess thats how we learn so I downloaded the Android SDK thinking I could use it to download and install the google USB drivers that way, but I can't get out of boot loop to make sure USB debugging is checked. The only thing I can access is the stock download mode which would be great if I could use the USB connection.
What am I missing? Any suggestions?
USB Not Recognized Error
I noticed that my phone suddenly stopped being recognized on both my Windows 7 and Win8 laptops. I have been trying to fix it with the drivers but to no avail. However, I plugged my phone in with a different USB cord and voila it was recognized and working. Maybe this could possibly be a simple fix.
My computer stopped recognizing my Skyrocket
Hi Everyone,
I also am having trouble with my win 7 computer recognizing my Skyrocket suddenly. I have been using several KitKat roms and they have been working just fine, except for some reported bugs that the CM devs are working on. I even was able to connect to the computer and explore both my internal and external drives. Then suddenly that stopped and the computer gave me a need to get drivers warning. I've tried to download drivers from Samsung and the computer says they are already installed. I also tried the universal driver download and got the same message. Any help would be appreciated. Like the others on this forum, I wouldn't be able to odin if I got in trouble.
Thanks for your concideration,
drewfs7270
I switched to a different rom and now it's working again !
Sent from my SAMSUNG-SGH-I727 using Tapatalk
Thanks.. :good: usefull
Also, any mobile manufacturer website has guides or direct downloads for drivers. Otherwise uni drivers suffice.....
Sent from my Nexus 5 using xda app-developers app
mtk preloader driver unable to install/unplugged appears
mt65xx unplugged when I try installing my device, I tried uninstalling all preloader vcom drivers in my laptop then restart and when I try to connect my device mtk mt65xx preloader just pops up in device manager then suddenly disappears and unknown device shows instead. I also tried manually update driver for unknown device then select the folder where my mtk driver is saved still unsuccessful? I've also searched and tried many other ways out there still no luck. Can anybody give me a solution? By the way i'm using windows 7 x64.
Delted
Edit: Deleted
soft brick
I face bad experienced, the tablet can not boot ( after install TWRP ) but enable to enter the fastboot mode and can be detected by the computer as android adb interface but adb can't communicated with the tablet. (list of devices atached)
I do have a backup file ( I make it before soft brick, I make backup using dd command, because I don't have cwm/twrp recovery ).... but how to flash it ? Tablet chipset is wonder media 8980 OS android 4.2.2
I can not flash it by adb/fastboot.
Maybe someone here can give me a little guide for how to....
I really appreciate for your kindness
Hey, I made an expirience, which might help other users as well.
I have a Sony device (Z1C) and use Windows 10, maybe this will help for other brands and for other Windows 10 users.
I installed drivers for my device and was able to use adb. When I put the phone into fastboot mode, it was not recognized anymore. I found out, Sony has a seperate (updated, maybe?) driver for fastboot mode. When I tried to install this, the driver was not signed and Windows refused to install it. However, you can enter the UEFI (successor of BIOS) and enable installation of unsigned drivers (at own risk). Then I was able to install the fastboot driver and controll my phone in fastboot mode as well as in adb mode.
In conclusion: You might think you installed drivers, because you did, but maybe you did not.
Even on LineageOS page, many people fail to mention that, you DON'T and SHOULDN'T install any generic or universal ADB driver if you have Samsung device. As you can just install Samsung USB Drivers officially from Samsung site. Samsung USB Drivers already contain ABD interface driver just fine so Universal ADB driver is redundant for Samsung phones.

Rooting - Driver issues (ADB works, fastboot doesn't)

Hello,
trying to root a Nexus S but I have issues with the drivers.
Running "adb devices" properly shows my phone's serial number. However, when the phone is in fastboot mode, the "fastboot devices" command does not show anything and trying to run the unlock command gets stuck in a waiting loop.
I'm at a loss. I downloaded various driver archives and tried PDANet, with no success.
In Fastboot, the phone shows up as "Unknown device" in the device manager (Windows 7 64bit) with a yellow warning sign.
I tried to manually update the drivers and point Windows to the directories of the drivers I downloaded but it won't accept the drivers, insisting they are not compatible.
Any help would be much appreciated!
http://forum.xda-developers.com/showthread.php?t=2277112
See of this helps at all

Help needed! ADB issues(detected on phone but not in fastboot)

Dear all,
Please Help me. My One plus one is on CM12 official rom (rooted). Problem is when I connect my phone to computer and use ADB it is detected (adb devices: number & devices detected) but when in fastboot (fastboot devices : nothing is detected) I check in my device manager (yellow triangle on android ) My problem is why CAN it be detected when my phone is on but NOT during fastboot.
Necessary checks done : USB debugging, Universal driver, SDK installed, USB driver reinstalled again, tried changing usb ports on computer, tried on 2 laptops)
I am helpless, tried checking on forums can not find the answer.
CalvinVeez said:
Dear all,
Please Help me. My One plus one is on CM12 official rom (rooted). Problem is when I connect my phone to computer and use ADB it is detected (adb devices: number & devices detected) but when in fastboot (fastboot devices : nothing is detected) I check in my device manager (yellow triangle on android ) My problem is why CAN it be detected when my phone is on but NOT during fastboot.
Necessary checks done : USB debugging, Universal driver, SDK installed, USB driver reinstalled again, tried changing usb ports on computer, tried on 2 laptops)
I am helpless, tried checking on forums can not find the answer.
Click to expand...
Click to collapse
Have test to fastboot commands?
In fastboot be unplugged
Write
fastboot reboot
for test
Will answer wait for device
Plug device to test
My pc also does not recognise but work fine
with commands
geowolf1000 said:
Have test to fastboot commands?
In fastboot be unplugged
Write
fastboot reboot
for test
Will answer wait for device
Plug device to test
My pc also does not recognise but work fine
with commands
Click to expand...
Click to collapse
Tried adb reboot bootloader then phone boots into fastboot mode but from here..
is total no connection. Tried checking fastboot devices (nothing), fastboot reboot (waiting)
then i tried as u said unplug & plug in (not recognize) from here adb cannot be written anymore. (no more commands can be typed). Tried others like down loading Pdanet ,force install driver..Nothing works. Thinking ,did I corupt the bootloader while I was rooting it last time.?
I think if something was wrong with bootloader you could not either boot .
Do you use antivirus to pc?
Try without antivirus
What happening the false is from computer
Mine is reverse issue. When in fastboot mode, pc recognizes OPO, but when OPO is normally connected to pc, adb is not working. Its charging and can transfer data through USB, but OPO is not recognized through adb commands. Device Manager too recognizes my OPO only when it is in fastboot mode and not when normally connected via USB for data transfer.
I have a software, through which I can REVERSE TETHER my PC's internet to my mobile via USB. Because my OPO is not recognized via USB in normal mode, I can't do that. Any idea, what's wrong with my OPO.
(I have installed Android SDK and google usb drivers, for my OPO to work in fastboot. I have rooted. My pc runs on win7)
mrsureshisha said:
Mine is reverse issue. When in fastboot mode, pc recognizes OPO, but when OPO is normally connected to pc, adb is not working. Its charging and can transfer data through USB, but OPO is not recognized through adb commands. Device Manager too recognizes my OPO only when it is in fastboot mode and not when normally connected via USB for data transfer.
I have a software, through which I can REVERSE TETHER my PC's internet to my mobile via USB. Because my OPO is not recognized via USB in normal mode, I can't do that. Any idea, what's wrong with my OPO.
(I have installed Android SDK and google usb drivers, for my OPO to work in fastboot. I have rooted. My pc runs on win7)
Click to expand...
Click to collapse
Install pdanet+ for win

Device not recognized in fastboot on Mac and not recognized at all on PC

I'm hoping someone can help me out here. I've rooted phones before and didn't have any trouble previously. I just bought a used Pixel 3 on eBay with the plan to root using Magisk. The only problem is I can't get the device to be recognized at all on my PC. I've tried all the usual things like different USB ports, different cables, cleaning out the port, etc. I have the latest drivers installed and I have a Pixel XL that is recognized by my PC immediately so I know I have the correct drivers installed. Pixel 3 does not show up in Device Manager at all. I have USB debugging enabled on the device, but it never prompts me to Allow USB debugging when I connect the Pixel 3 to my PC.
Now, here's the weird part. I know the cable is working fine because I use the same cable and plug it into my Mac. The Pixel 3 is recognized immediately and I'm prompted to enable USB debugging. ADB then works just fine on my Mac. 'adb devices' shows my phone. But I then try to use 'adb reboot bootloader' and my phone reboots to the bootloader as it should. At this point my phone says it's in FastBoot Mode, but the device isn't recognized using 'sudo fastboot devices' and if I try 'sudo fastboot flashing unlock' it just sits there saying 'waiting for any device'. I've also tried putting it into FastBoot mode manually by using the Power and Volume Down key, but run into the same issue with it not being recognized while in FastBoot mode.
Could the previous owner have done something to the bootloader to cause the device to not be recognized in FastBoot mode? And is there any way to fix it? Why would the phone be recognized on my Mac without issue, but using the same cable and multiple different ports on my PC, it never gets recognized?
Any help would be very much appreciated here as I'm at a loss as to what I can do and fear I just spent money on an expensive paperweight.
I tested the cable I'm using with my Pixel XL and it's immediately recognized by my PC and the notification for USB debugging shows on the phone, so I know the cable is working out. No device ever shows in the device manager when I have my Pixel 3 connected though. I've even uninstalled the drivers while my Pixel XL is connected to hopefully put Windows into a driverless state hoping my Pixel 3 would then show up as an unrecognized device, but no device. I can't get it to show up at all in Windows for some reason and it's not recognized while in fastboot mode on my Mac. Fastboot mode information all seems to match what a Pixel 3 should look like as well, so I don't think the previous owner installed the wrong software causing device id mismatch. Anyone have any other suggestions for what I can try?

Question Device not connecting at all in bootloader

Hey guys,
I am Currently attempting to unlock the bootloader on my Pixel 6a, but when I attempt to connect via fastboot in the bootloader my PC shows nothing connected? I can push commands through ADB while the device is booted and have full functionality, but as soon as I reboot the device into the bootloader I lose connection to my PC. OEM Unlocking is enabled in the settings and I have toyed with updating it to the latest update and factory resetting the device. It shows correctly in device manager as 'Pixel 6a' while USB Debugging is disabled and as 'android composite ADB interface' while it is enabled.
To clarify as I am sure many have seen this issue before I do not believe it do be a driver issue as the device will not show up at all in device manager, not even showing with the incorrect driver (No ding to indicate a device has been connected). I have tried using 2 different USB C -> A cables in all slots of two entirely seperate PC's (Both running Windows 10). When I enter fastboot with OEM Unlocking disabled it acts no different to when it is enabled.
I appreciate any help or insight any of you folks can give me.
Device is currently running Android 13 Build number TQ2A.230505.002 if you need anymore info please let me know.
The OEM Unlocking toggle does not affect whether USB function works. It is only a "safety" that allows unlocking the bootloader.
Have you ensured you've installed the correct drivers? Google USB Drivers
I have spent a long time looking at drivers, but I have no device to install the drivers to as the connection drops out once I eneter the bootloader. I have used Zadig in the past to install the correct drivers for devices but when I reconnect the device while I have it open it cannot even detect a new device being connected to the PC. (Also no audible tone which would be heard even with incorrect drivers) I actually only recently used Zadig to install the correct WinUSB drivers for my S10e in which I connected it to my PC in download mode (Queue audible ding) and used Zadig to overwrite the incorrect driver with the correct one. It's almost as if the device will not communicate while it is in Bootloader mode?
I assume you have checked with the 'fastboot devices' command to see if your device is connected when in fastboot mode?

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