[Tutorial][How to] Unlock Bootloader and Install Custom Recovery and Root

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By stirredo, Member on 4th October 2014, 07:16 PM
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24th April 2015, 04:23 PM |#11  
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Originally Posted by Saurabh K

That is the same issue faced by me .

Did you find any solution

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24th April 2015, 05:08 PM |#12  
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Not yet, but trying....

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31st December 2015, 04:19 AM |#13  
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thanks for this awesome tutuorial.... But i have a problem in unlocking the tutorial
The problem is that how can i unlock my bootloader when oem unlocking is turned off...
Recently i tried to flash CM12.1 on my YU YUNIQUE YU4711 without turning on OEM unlocking and now I am stuck at the Fastboot mode so i cant start up my phone.... So i wanted to know that how i can unlock the bootloader when OEM unlocking is turned off..
PS- I cant even go to recovery moded
thanks in advance
5th May 2016, 10:31 AM |#14  
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Format Userdata
Originally Posted by stirredo

Someone in this thread reported that they got stuck on the recovery, meaning the phone boot normally.

The port maker for recovery for our phone mentioned formatting userdata command in his post, so I did the same. I didn't want newbies to experience any trouble.

I did got stuck at bootloader when I dedn't format Userdata. Thanx for the tip.

---------- Post added at 03:01 PM ---------- Previous post was at 02:53 PM ----------

When I opened SuperSu after installing SuperSu through recovery, it says "There is no SU binary installed, and SuperSU cannot install it. This is a problem! If you just upgraded to Android 4.3, you need to manually re-root - consult the relevant forums for your device!"
What do I do now?
21st May 2016, 12:20 PM |#15  
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Originally Posted by stirredo


I know there are some tutorials for this already but I felt like they missed out a few steps that might not be obvious to some who are new to this.

This tutorial applies to all of Android One Device (Micromax Canvas A1, Karbonn Sparkle V Blue, Spice Mi-498 Dream Uno).

Unlocking bootloader will lead to formating of your phone. The stuff inside your sd card is safe but all your apps and their data will be deleted.

Unlocking bootloader:

1. Download Universal ADB Driver installer from here.
2. Connect your phone and run the Universal ADB Driver installer. Click 'Install' button and a warning should pop up. Just click "Install anyway" and it should look like this:

3. Download ADT Bundle from here for Win-32 Bit and from here for 64-Bit . If you are unsure which version of windows you have just download the 32-Bit one.

4. Extract the zip file in your C:\ drive like this (You can install it wherever you like but this tutorials assumes this location for simplicity). Add adb and fastboot to system path by following this tutorial . This will allow you to run adb and fastboot commands from any location on cmdline.

3. Switch off your phone. Now, Press POWER BUTTON + VOLUME UP button for about 5 seconds. A menu should appear. Note: VOLUME UP allows to navigate the menu (move down the menu). Press VOLUME DOWN button for selecting/choosing fastboot. On your phone, it should say something like
Connect your phone to the computer if it wasn't already.

4. (Assuming Win 7) Click on start menu > Search for 'Command Prompt' and right click and select 'Run as Administrator'.

5. On command prompt, Type:
fastboot devices
If it shows something, that means we can proceed to unlocking bootloader. Otherwise, it means that the driver was not installed correctly.

6. Now, Type the following commands:
fastboot oem unlock
fastboot format userdata
fastboot reboot
Now, your bootloader is unlocked.

Install a custom recovery.

1. Download custom recovery from this thread.

2. Place the download file, 'recovery.img' file in C:\ drive. (Again, you can place it anywhere but this tutorial assumes this path).

3. Run the following command (Assuming already in fastboot mode again. If not, follow the above steps to go to fastboot mode). :
fastboot flash recovery c:\recovery.img
After doing so, it should look like this:

4. Reboot your phone and you are done by typing:
fastboot reboot

Now, you have installed CWM custom recovery. On to installing root.

Rooting your phone:

1. After installing custom recovery, download Super-Su .zip file.

2. Place the .zip file on your sd-card. If your computer doesn't show your phone as MTP device, download the drivers from here.

3. Boot into recovery, by pressing POWER OFF + Volume UP button for 5 secs and choosing Recovery by pressing Volume Down (NOTE: Use Volume UP for menu navigation)

4. After booting into recovery, Choose 'Install Zip'. You can use Volume UP and Volume Down for navigating here and Power Off button for selecting a menu item.

5. Now, select 'choose zip from /external_sd' and not '/sdcard'

6. Select the Super-Su zip file you placed on your sd card and install it.

Now, Reboot your phone. It might say something like 'su may have been removed' but ignore and press 'No'.

Tutorial Complete

Let me know if there are any errors in this Tutorial.

bro, my bootloader is already unlocked, so i was using the flash recovery command directly, and i was unable to flash recovery, everytime i go into recovery it opens stock recovery, what should i do to flash recovery now, no method is working, is it compulsary to unlock bootloader every time flashing recovery, mine is already unlocked, but cant able to flash recovery, please help ,its urgent.
28th November 2016, 11:16 AM |#16  
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I am on a custom ROM right now( Resurrection ) and have unlocked the bootloader
Can I relock the bootloader using Androidone tool
Will it format userdata?
Can I keep the Custom ROM after relocking?
Please help
9th November 2017, 07:16 AM |#17  
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hi my device is not boot after restart.always need to run fastboot continue. have you any idea how to resolved ?
21st January 2018, 07:47 AM |#18  
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my phone showing device not found error in ADB driver installer. actually phone is unable to start, it is continuously looping in start logo
24th October 2018, 02:33 AM |#19  
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is the fastboot format userdata command required? what will happen if i fail to issue the fastboot format command following fastboot oem unlock command?
22nd February 2019, 10:12 PM |#20  
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hello i want the unlocked bootloader file for my Micromax e313 please send me the link to get it please help me
21st December 2019, 06:20 PM |#21  
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[email protected]:~$ fastboot oem unlock
FAILED (remote: Flashing Unlock is not allowed
finished. total time: 0.000s
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