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Hello everyone,
I am new to XDA but not new to the Android rooting, flashing industry. I've flashed and rooted several phones, aswell as my own phone with a custom ROM. So I figured, since mine tf700t hasnt any warranty anymore that I will install Cromi due to the lag of the original software.
In order to install Cromi you need an unlocked bootloader and TWRP installed. The unlocking of the bootloader was like stealing candy from a baby. Then i wen't on to install TWRP with this guide: http://forum.xda-developers.com/showthread.php?t=1833212
1) Install Android SDK
2) Download TWRP Recovery blob and check the MD5 sum (don't skip MD5 check,is there to make sure the file is not corrupted)
3) Rename the downloaded file to twrp.blob and put the file in the same directory as your fastboot.exe (unless you have /platform-tools in PATH then you can flash from anywhere)
4) Turn off your device and boot to fastboot (power on while holding volume down, then select the usb icon and hit volume up to confirm)
5) Plug the device into your computer
6) Run the following command via the command line:
fastboot -i 0x0B05 flash recovery twrp.blob
At step 4 I ran into some problems. No matter what I do, i can't seem to boot the device into fastboot where you will see the three icons, among them the USB icon. I watched several youtube videos and read everything i could find but still no solution. What am I doing wrong at this point? What I did noticed was that the volume up and down buttons in some videos where at a different place then mine are. I have a Tf700t, when it is in landscape the volume buttons are at the top right corner on the edge of the device, the power button is on the top left on the edge of the device. At some videos the volume button was on the left side and on the top right side. Does this maybe have anything to do with it?
Thanks for the help in advance. I feel kinda stupid to not get it into fastboot mode, this never was a problem with other devices...
What firmware are you on? That guide is not updated for newer firmwares as newer firmwares have already removed that usb icon in the bootloader screen. In order to enter fastboot mode, all you need to do is power + volume down (holding down both buttons) and you should already be inside fastboot mode, no other button needed. Otherwise, through adb, you can try "adb reboot bootloader", which should take you to fastboot mode as well.
huy_lonewolf said:
What firmware are you on? That guide is not updated for newer firmwares as newer firmwares have already removed that usb icon in the bootloader screen. In order to enter fastboot mode, all you need to do is power + volume down (holding down both buttons) and you should already be inside fastboot mode, no other button needed. Otherwise, through adb, you can try "adb reboot bootloader", which should take you to fastboot mode as well.
Click to expand...
Click to collapse
Ah this explains a lot. Now when I connect it to my PC it is recognized, but when i run a 'fastboot devices' (eveything is set properly with paths etc) my tablet isn't recognized. Should I install a different driver? As for now my PC says it has APX drivers
tf700tTRANSF said:
Ah this explains a lot. Now when I connect it to my PC it is recognized, but when i run a 'fastboot devices' (eveything is set properly with paths etc) my tablet isn't recognized. Should I install a different driver? As for now my PC says it has APX drivers
Click to expand...
Click to collapse
It most likely means that you have the wrong fastboot driver. You should follow the instructions here (http://forum.xda-developers.com/showthread.php?t=2263822) to install the correct fastboot driver from the Universal Naked Driver pack. If you install the driver correctly, the tablet should appear as "ASUS fastboot device" in Windows' Device Manager. Then fastboot commands should work. As a quick reminder, the fastboot driver is a different driver from the adb driver. Windows will only see the fastboot device when you connect your tablet to your PC while the tablet is in fastboot mode, hence a separate driver is needed.
Moreover, when you flash the recovery later, you need to remove the dock and connect your tablet directly to your PC. In my case, even though fastboot recognized my tablet, the flash recovery command failed if the dock was connected.
huy_lonewolf said:
It most likely means that you have the wrong fastboot driver. You should follow the instructions here (http://forum.xda-developers.com/showthread.php?t=2263822) to install the correct fastboot driver from the Universal Naked Driver pack. If you install the driver correctly, the tablet should appear as "ASUS fastboot device" in Windows' Device Manager. Then fastboot commands should work. As a quick reminder, the fastboot driver is a different driver from the adb driver. Windows will only see the fastboot device when you connect your tablet to your PC while the tablet is in fastboot mode, hence a separate driver is needed.
Moreover, when you flash the recovery later, you need to remove the dock and connect your tablet directly to your PC. In my case, even though fastboot recognized my tablet, the flash recovery command failed if the dock was connected.
Click to expand...
Click to collapse
I tried many drivers from the universal naked driver pack. But still, wen i type in 'fastboot devices' nothing happens, and with getvar i only get 'waiting for device'.....I really dont get it, what am I not seeing her....
But then again I cant seem to get "ASUS fastboot device" in windows device manager. Only Asus fastboot interface and some others with ADB etc. Am I looking at the wrong drivers?
tf700tTRANSF said:
I tried many drivers from the universal naked driver pack. But still, wen i type in 'fastboot devices' nothing happens, and with getvar i only get 'waiting for device'.....I really dont get it, what am I not seeing her....
But then again I cant seem to get "ASUS fastboot device" in windows device manager. Only Asus fastboot interface and some others with ADB etc. Am I looking at the wrong drivers?
Click to expand...
Click to collapse
Let me try to recall the exact steps that I did to get the driver installed. I am using Windows 8.1, so the first step for me was to boot into troubleshooting mode of Windows to disable driver verification, but you won't have to do that if you use windows 7 or earlier. After that, open Device Manager, right click on ASUS bootloader interface (or a different name with the yellow question mark, but I remember when I first connected my tablet to my PC, the name was "ASUS bootloader interface"), choose Update Driver Software, then choose "Browse my computer for driver software", and click on "Let me pick from a list of device drivers on my computer". At the next screen choose "Have Disk", browse to the Universal Naked Driver folder and select the file "android_apxusb.inf". From the list you should be able to find "ASUS Fastboot Interface" and install it.
huy_lonewolf said:
Let me try to recall the exact steps that I did to get the driver installed. I am using Windows 8.1, so the first step for me was to boot into troubleshooting mode of Windows to disable driver verification, but you won't have to do that if you use windows 7 or earlier. After that, open Device Manager, right click on ASUS bootloader interface (or a different name with the yellow question mark, but I remember when I first connected my tablet to my PC, the name was "ASUS bootloader interface"), choose Update Driver Software, then choose "Browse my computer for driver software", and click on "Let me pick from a list of device drivers on my computer". At the next screen choose "Have Disk", browse to the Universal Naked Driver folder and select the file "android_apxusb.inf". From the list you should be able to find "ASUS Fastboot Interface" and install it.
Click to expand...
Click to collapse
I really dont get it....It just wont work. Fastboot still wont recognize my tablet.
If i get my hands on another Windows PC I will make a second attempt.
If someone knows a different solution, please tell me. Fastboot on the pc is properly installed for whats it worth....
Try Goo manager Open Recovery Script
I am not sure if this will help you because I am also new to this but I unlocked and rooted my tf201 prime using the steps you did. I rooted my Tf700T a few days ago and my unlocked didnt work until yesterday using unlocker 8 from the Asus site but I still could not make changes to my recovery with Clockwork Mod or TWRP until I used Goo manager and ran the Open recovery script. It worked on my TF700T with build number JOP40D.US_epad-10.6.1.14.8-20130514 which has Android 4.2.1. Give it a try it is easy.
Peace. I hope this helps
tf700tTRANSF said:
Hello everyone,
I am new to XDA but not new to the Android rooting, flashing industry. I've flashed and rooted several phones, aswell as my own phone with a custom ROM. So I figured, since mine tf700t hasnt any warranty anymore that I will install Cromi due to the lag of the original software.
In order to install Cromi you need an unlocked bootloader and TWRP installed. The unlocking of the bootloader was like stealing candy from a baby. Then i wen't on to install TWRP with this guide: http://forum.xda-developers.com/showthread.php?t=1833212
1) Install Android SDK
2) Download TWRP Recovery blob and check the MD5 sum (don't skip MD5 check,is there to make sure the file is not corrupted)
3) Rename the downloaded file to twrp.blob and put the file in the same directory as your fastboot.exe (unless you have /platform-tools in PATH then you can flash from anywhere)
4) Turn off your device and boot to fastboot (power on while holding volume down, then select the usb icon and hit volume up to confirm)
5) Plug the device into your computer
6) Run the following command via the command line:
fastboot -i 0x0B05 flash recovery twrp.blob
At step 4 I ran into some problems. No matter what I do, i can't seem to boot the device into fastboot where you will see the three icons, among them the USB icon. I watched several youtube videos and read everything i could find but still no solution. What am I doing wrong at this point? What I did noticed was that the volume up and down buttons in some videos where at a different place then mine are. I have a Tf700t, when it is in landscape the volume buttons are at the top right corner on the edge of the device, the power button is on the top left on the edge of the device. At some videos the volume button was on the left side and on the top right side. Does this maybe have anything to do with it?
Thanks for the help in advance. I feel kinda stupid to not get it into fastboot mode, this never was a problem with other devices...
Click to expand...
Click to collapse
mustafa_droid said:
I am not sure if this will help you because I am also new to this but I unlocked and rooted my tf201 prime using the steps you did. I rooted my Tf700T a few days ago and my unlocked didnt work until yesterday using unlocker 8 from the Asus site but I still could not make changes to my recovery with Clockwork Mod or TWRP until I used Goo manager and ran the Open recovery script. It worked on my TF700T with build number JOP40D.US_epad-10.6.1.14.8-20130514 which has Android 4.2.1. Give it a try it is easy.
Peace. I hope this helps
Click to expand...
Click to collapse
Oh! GooManager works again? Which TWRP version did it flash when you ran the Open Recovery script?
TWRP
berndblb said:
Oh! GooManager works again? Which TWRP version did it flash when you ran the Open Recovery script?
Click to expand...
Click to collapse
I had to flash it with openrecovery-twrp-2.6.3.2-tf700t.blob. using the platform-tools because I could not use the one with Open Recovery script by that time I wiped the entire device! It could have been my fat fingers but I just installed CM 11-20131221 (Kit Kat 4.4.2) on my tablet today without any issues. I have not done much with it yet but I will let you know later.
im trying to enter fastboot from bootloader but every time i select it, it just reloads the bootloader. everything else works fine.
the bootloader IS fastboot mode.
Well when I run fastboot protocol nothing happens
strker45 said:
Well when I run fastboot protocol nothing happens
Click to expand...
Click to collapse
Get into Bootloader. (I use ADB command: ADB Reboot Bootloader)
Use the volume down button to select "Fastboot Protocol."
It is deceptive as the screen on your Shield won't change.
Use your fastboot commands now. See if that works.
You need to make sure your fastboot and adb drivers are installed and recognized.
Also need fastboot on your pc of course. Good luck.
Once again, the bootloader is fastboot on your tablet, if you are on that screen then you can use fastboot if the above conditions are met.
Same symptom here.
When Android is loaded, Win10 finds it as both MTP and USB debugging device. adb is reporting back. All well.
However, when shield is in fastboot mode, fastboot finds nothing.
In my case reason was driver:
when connected in fastboot mode, win10 wants to install an
Android Device -Android Bootloader Interface
=> you see this in device manager
To satisfy Win10, download NVIDIA USB driver from here
https://developer.nvidia.com/shield-open-source
hence point the driver install in Win10 device manager to the driver download/extract location
Reconnect your shield.
In my case this worked.
Hope this helps
vrmuhr said:
To satisfy Win10, download NVIDIA USB driver from here
https://developer.nvidia.com/shield-open-source
hence point the driver install in Win10 device manager to the driver download/extract location
Click to expand...
Click to collapse
Thank you, worked very well for me.
hi guys,
i my shield is stuck on the nvidia logo when booting normally, if it brings up the bootloader, it shows unlocked but hitting continue caused it to freeze on the screen, recovery freezes on nvidia logo and fastboot protocol just brings it back to this screen. i orginally installed twrp and it confirmed successful flash of new os .... on reboot it bricked to its now state, i cant get into twrp or get my pc to see it to install a new copy
anyone got any ideas
thanks
@Fairmax don't click continue, it freezes because there is nothing to continue to, as long as you can enter bootloader your device isn't fully bricked. So, to fix your problem you will have to download official ROM from nvidia's site (https://developer.nvidia.com/shield-open-source find your model and click recovery images).
When you download latest ROM unzip it and follow the textual guide, but, there will be one file missing (i can't remember which one, user data maybe or something like that), don't worry and just continue with the next step. After you flash just reboot to system by holding power button. Good luck !
i cant seem to get it to be recognised by windows all i get is this-- Windows has stopped this device because it has reported problems. (Code 43) A request for the USB device descriptor failed.--
trying to install nvidia usb driver via have disk bring up an error that the file is not usable with x64 system
ok after many driver reinstall iv got device manager to say android adb interface but still not showing on on device list in cmd
Fairmax said:
ok after many driver reinstall iv got device manager to say android adb interface but still not showing on on device list in cmd
Click to expand...
Click to collapse
Which command did you type in?
fpozar said:
Which command did you type in?
Click to expand...
Click to collapse
adb devices shows no devices
i tried the 3 different option in the driver install which was android adb, bootloader, and something else and nothing shows in devices. i tried it on my laptop and a different cable and cant get adb to list the device :crying:
Fairmax said:
adb devices shows no devices
i tried the 3 different option in the driver install which was android adb, bootloader, and something else and nothing shows in devices. i tried it on my laptop and a different cable and cant get adb to list the device :crying:
Click to expand...
Click to collapse
Well of course adb devices shows no devices because you are not actually in adb mode, you are in the bootloader mode. Just download minimal fastboot and adb, install it and extract recovery image into the folder where you installed minimal adb and fastboot (you don't need any other drivers).After you did this and your device is in bootloader and connected, click on the path in your fastboot & adb folder and delete everything and type cmd. No need to do adb devices, just proceed with fastboot flash ...
fpozar said:
Well of course adb devices shows no devices because you are not actually in adb mode, you are in the bootloader mode. Just download minimal fastboot and adb, install it and extract recovery image into the folder where you installed minimal adb and fastboot (you don't need any other drivers).After you did this and your device is in bootloader and connected, click on the path in your fastboot & adb folder and delete everything and type cmd. No need to do adb devices, just proceed with fastboot flash ...
Click to expand...
Click to collapse
ah now that makes sence....silly me i dont do this very often . so fastboot saw device and iv uploaded all parts of the recovery image and rebooted but it is still stuck on the nvidia logo, that was the original file so now il try 5.2.0 and see if that works
Fairmax said:
ah now that makes sence....silly me i dont do this very often . so fastboot saw device and iv uploaded all parts of the recovery image and rebooted but it is still stuck on the nvidia logo, that was the original file so now il try 5.2.0 and see if that works
Click to expand...
Click to collapse
You can also try flashing twrp and then lineageos or something from twrp.
fpozar said:
You can also try flashing twrp and then lineageos or something from twrp.
Click to expand...
Click to collapse
good news after a few hours of trying (usb dropped connection a few times then battery died) it finally works again .....been over 2 years since iv had this shield running after nvidia did the recall , now goto put a different rom on there so it dosnt update and kill itself
Hello I had a similar issue with my k1 tablet and ended up flashing factory images via adb fastboot and all flashed fine. Now my tablet is stuck on the boot screen with the green and white nvidia logo. How long does it take to boot please?
I have same issue too. I can load TWRP and flash the other partitions but TWRP shows un-mountable partitions and even a full stock ROM flash will not allow it to boot. I have a similar issue with a recall tablet. what did you do to fix it?
When I try to install the USB Drivers It fails with an error message.
ADB devices works, but fastboot devices doesnt.
I'm on Windows 10.
Are you in bootloader-fastboot mode, when trying fastboot command? Since you need to be, for fastboot commands to work.
Fastboot commands only work in bootloader-fastboot mode.
adb commands only work when booted to OS, or alternately booted to custom recovery TWRP (when applicable).
redpoint73 said:
Are you in bootloader-fastboot mode, when trying fastboot command? Since you need to be, for fastboot commands to work.
Fastboot commands only work in bootloader-fastboot mode.
adb commands only work when booted to OS, or alternately booted to custom recovery TWRP (when applicable).
Click to expand...
Click to collapse
Yes, I'm trying fastboot from the bootloader screen.
On windows 8.1 it works, I can install the needed drivers, on windows 10 I cannot. Doesn't work. I wonder why adb works but fastboot doesn't.
I had this exact issue up until today, and this what I did to get fastboot on my shield tablet:
1. Uninstall all adb usb drivers just to make sure you start from a clean slate.
2. Then go to Nvidia (https://developer.nvidia.com/gameworksdownload#?search=SHIELD Family Windows USB) and download their Nvidia shield tablet drivers.
3. While plugged into the computer (have the tablet set to transfer files or mtp) go to the Bootloader menu on your shield tablet and then on your computer go to device manager and update the drivers. For me the device showed up as Fastboot, right click and select update drivers from the folder that you unzipped your nvidia shield tablet drivers to. When I did this I actually got an 'This device cannot start. (Code 10)' error message but I think this is okay because when I looked at the device manager again a new listing had appeared near the top called Android Composite Device.
4. Now go through the exact same process to install the drivers that you did for the 'fastboot' device but now for the 'Android Composite Device', you should also still get the 'This device cannot start. (Code 10)'. After you've done all that reboot the Shield Tablet.
5. Once the tablet has rebooted go to command prompt with Administrator Privledges and type ADB devices and your device should show up, then type adb reboot bootloader and the tablet will reboot into the bootloader menu. I this point I did not select fastboot protocol and I'm not sure if this made a difference, but in any case in the command prompt type Fastboot devices and at least for me this finally worked.
I hope this helps.
Thank you Captain_FSU! :good:
I had the same problem. My Shield K1 was showing up on adb devices but not at fastboot devices. I was unable to update the driver. In Win 10 Device Manager my Shield was showing up at Portable Devices and it was impossible to install the driver there. So finally I am able to unlock bootloader and install TWRP.
usb debugging is enabled on device. running latest version of adb, fastboot. Have tried on both mac and win10 but same issue on both.
Oneplus 7 pro is running 10.3.0GM21AA
>fastboot devices
>adb devices
List of devices attached
966c8016 device
Trying to use fastboot to flash patched magisk img and install magisk.
Do you enter in fastboot in phone?
Sent from my GM1910 using Tapatalk
Yes tried from bootloader as well
fustyler said:
Yes tried from bootloader as well
Click to expand...
Click to collapse
bootloader-fastboot mode is the only time fastboot commands will work. I know you tried this "also". But I feel you are wasting your time trying to run fastboot when phone is booted (instead of focusing on the situation where fastboot should actually be working). adb and fastboot will not work at the same time by definition. Also, debugging does not need to be enabled for fastboot (only for adb).
redpoint73 said:
bootloader-fastboot mode is the only time fastboot commands will work. I know you tried this "also". But I feel you are wasting your time trying to run fastboot when phone is booted (instead of focusing on the situation where fastboot should actually be working). adb and fastboot will not work at the same time by definition. Also, debugging does not need to be enabled for fastboot (only for adb).
Click to expand...
Click to collapse
I have tried it from bootloader and still the same on my pc it just says waiting for device.
What else can I try?
fustyler said:
I have tried it from bootloader and still the same on my pc it just says waiting for device.
What else can I try?
Click to expand...
Click to collapse
Try a different cable, different USB port. Fastboot can be finicky sometimes. You can also go to Windows Device Manager, find the device, and see if you can manually select the drivers. There is a generic Android device driver that sometimes gets fastboot to work properly on some of my past devices. This is on Windows 7, haven't done this on WIn 10 yet, so not sure if it is exactly the same.
redpoint73 said:
Try a different cable, different USB port. Fastboot can be finicky sometimes. You can also go to Windows Device Manager, find the device, and see if you can manually select the drivers. There is a generic Android device driver that sometimes gets fastboot to work properly on some of my past devices. This is on Windows 7, haven't done this on WIn 10 yet, so not sure if it is exactly the same.
Click to expand...
Click to collapse
Have tried different cables and different machines both pc and mac
What's you gotta do is look up how to disable signature verification in Windows 10. Then once you done that stuff put your device in fastboot mode then on the window 10 PC open of device drivers find Android phone then bootloader update driver. There will be 2 choices for updating pick the on device one. Should do you right.
I had to do this after flashing the T-Mobile version to my international version with the msmtool and it locked my bootloader for me
Since adb is working, do an adb reboot bootloader and it'll then boot into fastboot. If you can't get a return on fastboot devices at this point, it could be you haven't oem unlocked your phone yet.
mnemesis said:
Since adb is working, do an adb reboot bootloader and it'll then boot into fastboot. If you can't get a return on fastboot devices at this point, it could be you haven't oem unlocked your phone yet.
Click to expand...
Click to collapse
I ran adb reboot bootloader from pc to boot phone into fastboot.
In the bootloader it states device state is unlocked
However fastboot devices ran from pc still shows no device.
billyt1 said:
What's you gotta do is look up how to disable signature verification in Windows 10. Then once you done that stuff put your device in fastboot mode then on the window 10 PC open of device drivers find Android phone then bootloader update driver. There will be 2 choices for updating pick the on device one. Should do you right.
I had to do this after flashing the T-Mobile version to my international version with the msmtool and it locked my bootloader for me
Click to expand...
Click to collapse
Thanks this fixed it.
Issue fixed by billyt1's comment above. case closed.
billyt1 said:
What's you gotta do is look up how to disable signature verification in Windows 10. Then once you done that stuff put your device in fastboot mode then on the window 10 PC open of device drivers find Android phone then bootloader update driver. There will be 2 choices for updating pick the on device one. Should do you right.
I had to do this after flashing the T-Mobile version to my international version with the msmtool and it locked my bootloader for me
Click to expand...
Click to collapse
This worked for me as well. Just to make it clear, rephrasing his reply. After disabling signature verification on windows 10, connect your phone in fastboot mode & open Device Manager on Windows & look for Other > Android device.If it is found, This means Windows 10 is not having proper drivers to recognize fastboot device. Now install "OnePlus_USB_Drivers_Setup.exe" & it will show pop up for installing driver & after accepting(this is blocked due to signature verification in normal situation), Android device will be recognized in fastboot mode.
Giri Prasad said:
This worked for me as well. Just to make it clear, rephrasing his reply. After disabling signature verification on windows 10, connect your phone in fastboot mode & open Device Manager on Windows & look for Other > Android device.If it is found, This means Windows 10 is not having proper drivers to recognize fastboot device. Now install "OnePlus_USB_Drivers_Setup.exe" & it will show pop up for installing driver & after accepting(this is blocked due to signature verification in normal situation), Android device will be recognized in fastboot mode.
Click to expand...
Click to collapse
ugh. I've tried all of these suggestions and still can't get the device listed in adb while in fastboot.
I even used the TOOL ALL IN ONE without success. Funny thing is, that program recognizes my phone being in fastboot and has it listed. But if I try to flash a recovery from there, it opens a command window and ultimately says there was an error in connecting to the device.
Any help is appreciated.
I have a similar problem. I tried to disable the signature. Installed a new Redmi Note 7 driver. The phone is recognized as an Android phone in the device manager. In Orangefox recovery it is recognized with ADB command. In fastboot it is not recognized. In Orangefox I can't format data. So my ROM is not booting up. So I want to flash fastboot ROM with Fastboot but in Fastboot device is not even recognized.
t
puyow18 said:
ugh. I've tried all of these suggestions and still can't get the device listed in adb while in fastboot.
I even used the TOOL ALL IN ONE without success. Funny thing is, that program recognizes my phone being in fastboot and has it listed. But if I try to flash a recovery from there, it opens a command window and ultimately says there was an error in connecting to the device.
Any help is appreciated.
Click to expand...
Click to collapse
Sorry on the late reply. Pretty sure you can only do fastboot boot boot(recovery).img or\and boot_a or boot_b. Wont let you fastboot flash boot.img.
billyt1 said:
What's you gotta do is look up how to disable signature verification in Windows 10. Then once you done that stuff put your device in fastboot mode then on the window 10 PC open of device drivers find Android phone then bootloader update driver. There will be 2 choices for updating pick the on device one. Should do you right.
I had to do this after flashing the T-Mobile version to my international version with the msmtool and it locked my bootloader for me
Click to expand...
Click to collapse
Thank you so much!
I also had same issue. my redmi note 6 pro and asus zenfone max pro m1 can be detected in adb but not in fastboot. tried everything. changing driver/disble signature verification. also tried virtual box ubuntu/window 7. but not succeeded. It is actually an issue with usb 3. so I bought usb 2 hub. now everything works fine.
Thank you Thank you Thank you Thank you Thank you Thank you...I have been fooling with this all day
Hi, I already solved this issue (but this only works for xiaomi phone (Redmi Note 7 to be specified), for other brands I think need to download your devices flasher/driver tool)
For Xiaomi user only
1. Download Mi Unlock Tool (https://mi-globe.com/download-xiaomi-mi-unlock-tool-all-versions/) (Version 4.5.813.51)
2. Extract the files anywhere you like
3. Run MiUsbDriver.exe to install the driver
4. Try fastboot devices command
I hope this helps you guys. The Mi Unlock Tool also useful to unlock device locked bootloader.
For other devices maybe can follow this tutorial
Fixed: Fastboot not detecting your Android device
Fix the Fastboot not detecting your device. If your device is not detected by the Fastboot then these tricks will really help you.
www.qasimtricks.com