[Nexus 5 General] wellwisher_k:
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First, I am not responsible if you damage your phone in any way.

Also you might back up your phone's data completely because after unlocking bootloader you can lose all your installed data.

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So, first step is unlock the bootloader. First go into

Setiing> About Phone > Press Build Number A couple of time until it shows you are a developer now > go back > Developer Options > Turn on USB debugging.

After that, go to your bootloader, by powering off your phone and once it is powered off press the Volume down key + Power button until something appears with a vibration.

Now download adb and fastboot from this link:

http://*******/1Zsyme

After downloading it, install it. And you can install it easily with no problem. Just make a folder in your windows drive of :

C:\Android-adb\

And you are good to go.

Now goto that folder (C:\Android-adb\) and press SHIFT+CTRL+RIGHT-CLICK together or just SHIFT+CTRL first and then RIGHT-CLICK and then click "open command window here".

Now connect your nexus 5 and check if your PC makes a sound like when you connect a external device.

If yes, then you are good to go. Else try connecting it several times to automatically make the PC install any drivers.

After this, go to that DOS type window and write:

fastboot devices

(press enter to activate any command)

If you it shows a serial number then you are doing fine.

After this, write this command in that CMD.exe window:

fastboot oem unlock

and wait until something pop-ups in your phone. It might be a warning, read it carefully and using your volume up or down key cycle through the options and using power button select yes. And it might reboot on it's own else restart manually by pressing the power button for 10 or 15 sec until you see your screen with a unlocked lock which means you have successfully unlocked the device.

Now after that, it's finally time to FLASH recovery file.

For this to happen you need to download CWM latest version from here:

http://*******/1Zt1Fs

It's latest for HAMMERHEAD or NEXUS 5!!!!

Now, again go to the bootloader as described in the beginning.

Now you can also copy the recovery zip file by your data cable of your phone by turning in on normally and also from bootloader.

How to do it from bootloader? Here's how too.

Now you have to be on the bootloader screen. Now goto the same CMD.exe and write:

adb push filename.zip /storage/emulated/0/

adb push filename.img /storage/emulated/0/

If you get any error ask me.

Now it might get some time to be moved to that.

(Data Cable should be attached to do so, also the RECOVERY img file should be in C:\Android-adb\ this folder to be moved to PHONE)

Now, you might have successfully moved the zip file to your phone. So now write this command to flash Recovery.img file:

fastboot flash recovery your_recovery_image_name.img

After this, it will FLASH the recovery file. Until it's installed successfully wait till then.

Once it is FLASHED, now cycle to recovery mode using volume buttons from the BOOTLOADER and wait till it gets there:

Now you will see some options, but you need to flash a zip file so cycle again using volume buttons and select anyone using power button. So select:

install zip

Now select choose zip from /sdcard

Now you are in your internal storage's directory where you moved your zip files from CMD.exe. Just select it and you are done. go back and reboot system now. And you are done.

Don't forget to say thanks if you find it helpful in any way.

Also report to me if you get any errors between in it. By the way, I didn't have any errors in my journey to do this in first time.