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[Tools, Tips & Tutorials] [Device Team]Unlock Bootloader-No more "Couldn't Verify Device" Error

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192505 1003 |
23:08, May-13-2016 | From PC
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Go to reply no.
This post was edited by Nivu at 14:24, Aug-04-2016

Successfully Unlock your Bootloader - No more "Couldn't Verify Device" Error

Hello friends,

                     After lot of tries, at last I found a way to unlock bootloader of my Redmi Note 3 SD, now I am glad that I can share this to my fellow miui-er's since I know that many of them still experiancing "couldnt verify device" error and I know how hard it is to feel, so I am sharing my steps which successfully unlocked my device.

Step 1: Apply for unlock permission here (it will take 2 to 3 weeks for getting permission).

Step 2: After getting unlock permission, download the Mi Unlock tool from here.

Step 3: If you are on global stable version i recommend to download Global Beta Recovery rom and update it using updater app.it also working for some people (you can update to global beta from global stable and vice versa but you cant update to chinese rom from global rom with updater app)

Step 4: Login to the same Mi account which is used for applying permission and switch on find my device (make sure that you login with mobile number instead of mail id).

Step 5: Login to i.mi.com and sign in with your Mi Account, it will send verification code to your mobile number, type the code and get verified. Now it will show connected device, check whether your device is online or not.and remove all other devices from site aswell as mobile phone.
Note: Make sure that you login with mobile number instead of mail Id (This step is very very importent).
Untit.png Note:If your device not showing online on i.mi.com go to Settings>Sync>Off and On
Untitled.png
After step 5 wait for a day and proceed with step 6


Step 6: Now login to the Mi unlock tool with same mi account with your mobile number instead of mail Id.

step 7: From your mobile go to developer option and enable oem unlock and usb debugging.
Step 8: Switch off your mobile and connect the device in fastboot mode (pressing power and vol- button together) to PC.

Step 9: Click unlock button.
Ta daaa!! your bootloader is unlocked in no second
you can try on any version including global stable, there is no rule....;)
dont forget to replay if you successfully unlocked..

Thanks,
Nivu




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18:07, Jun-24-2016 | From PC
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j150 replied at 2016-5-15 22:50
thanks for tutorial but the issue is same. .Tried everything with global stable and global beta late ...

You just said it rightly, it is ruining customer experience and hurting the very image it has created among developer. This process is very uncertain and I feel the real problem is with Mi Cloud which is not in sync with the permissions given by Xiaomi. After a while probably when the actual Sync happens, devices gets unlocked and the user thinks that the real reason is because of ROM/Firewall/successfully locating phone etc. I have made more than 25 attempts but no luck, tried all roms and unlocking tool. Nothing worked for me. Time to sell RN3 and move on probably. RN3 is no doubt a good device, but not developer friendly.

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17:21, Jun-25-2016 | From PC
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I made video for this Check it out


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Sripathi my device is not showing on i.mi.com, what to do?  22:50, Oct-09-2016

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14:44, Apr-24-2017 | From PC
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This post was edited by archz2 at 14:46, Apr-24-2017

I have redmi 4A. I followed all your instructions and located my device before switching my phone in fastboot mode.
My device was showing online.

However I get this error while using the unlock tool. What should I do?


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19:00, Sep-13-2016 | Via mobile
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My mi id-1606985926
Model-redmi note 3 Sd
Rom-global dev 6.9.9 mm
I tried everything adb driver installed, find device both in mobile and pc,only one device is online, even reset data and tried again but still
It shows couldn't verify device error..
Its very frustrating i got permission 2months ago..
Pls help..

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08:16, Jun-06-2016 | From PC
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Two requisites after logging into i.mi.com :
1. The device should show up online.
2. Find device should be able to locate your phone on the map.
Try turning find device on and off in the phone if it is showing offline. I was able to unlock successfully on Chinese developer as well as global stable (Yes!! Global stable ROM)

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16:57, Jun-27-2016 | From PC
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j150 replied at 2016-6-27 11:23
m thinking the same time to switch over to dev friendly phones ..i my trying from last 50 days, un ...

I agree. And bootloader may also get locked in future as well, while you flash a new ROM. So its not just one time struggle but a repetitive problem.

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23:17, Jun-07-2016 | From PC
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Perfectly unlocked my Redmi Note 3 with ROM Ver.. 6.5.26. Thanks for you guide. :)

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14:20, May-14-2016 | From PC
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Not working for me :(

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Roussinov Check which region is selected on phone logged Mi account settings.  18:35, May-19-2016

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01:22, Sep-23-2016 | From Redmi Note 3
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This post was edited by TALwinDER... at 01:29, Sep-23-2016

I unlocked the bootloader by unofficial method how can i relock it. So that i can use this official method... permission is already granted for my RN 3
Current ROM  MIUI GLOBAL 7.1| 7.1.8.0 (LHOMICL)

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15:15, Sep-17-2016 | From PC
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on miui unlock link.. the option to apply for the unlockpermissions is disabled.. when I login using MiUnlock tool.. it says "Your device isnt supported by MiUnlock"..

I can see my device online in Mi cloud account.

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Nivu where did u buy ur phone..? i think ur device is either fake or unofficial rom is flashed by the retailer. thats why its showing your device is not supported.. flash the original rom and try again  22:16, Sep-17-2016

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00:17, May-14-2016 | From PC
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you sir are a genius, i followed your guide to the T and noticed that my account on i.miui.com for some reason shows 2 redmi note 3 , i deleted one of them and made sure it shows just 1 online , then rebooted and done . phone unlocked.

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Nivu i happy to hear that ur unlocked successfully  00:24, May-14-2016

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02:51, May-14-2016 | Via mobile
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You are a genius! Solved with telephone number in the account instead of email! Thanks

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03:13, May-14-2016 | From PC
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thanks a lot,successfully unlocked :)

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09:35, May-14-2016 | Via mobile
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i can see two devices  1. rn4g 2. rn3, now i want to delete rn4g , but when i go to that particular page ,in status bar its chinese and whole page is blank, how to delete another mobile then ??

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Nivu u can change the language from that site.. and please use pc for sign in to i.mi.com. site is less compatible to mobile phones  10:30, May-14-2016

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10:21, May-14-2016 | Via mobile
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mi unlock tool signin using mobile no. not successful it says account not found i was signup using mob no.

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Nivu put+91 before number  10:28, May-14-2016

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 Author| 10:31, May-14-2016 | From PC
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iamattri replied at 2016-5-14 03:13
thanks a lot,successfully unlocked :)

your welcome.. happy to help

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 Author| 10:31, May-14-2016 | From PC
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Margatto replied at 2016-5-14 02:51
You are a genius! Solved with telephone number in the account instead of email! Thanks

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 Author| 14:23, May-14-2016 | From PC
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make sure that only one device is connected in i.mi.com..check it is online or not

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waleed65 I have removed other devices from mi account & the device was online. I am on Global beta. Can u plz tell me how can i flash china dev rom, since my bootloader is locked. I have seen many posts doi...   19:52, May-19-2016

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