Unlocking cellphone can sometimes be complicated, not the handiwork but the complex rules imposed by OEMs & carriers. Thus we recommend looking into manufacturers’& carriers website for unlocking directions, and understand the rules before unlocking your phone.
If you have passed that trench, unlocking cellphone is not that hard to do by yourself. Here we provide an unlicking guide for Google Nexus 5X & 6P. The phone is purchased directly from Google instead of a carrier.
PREREQUISITES TO CHECK BEFORE YOU UNLOCK NEXUS 6P&5X BOOTLOADER:
CREATE A BACKUP OF YOUR DEVICE AS THIS PROCESS ERASES ALL THE DATA.
Install Nexus 6P USB drivers.
Set up Fastboot / ADB with Android SDK. If you have Android SDK, you can download fastboot and extract it in android-sdk-windows\platform-tools directory.
Make sure your Nexus 6P&5X is charged up to at least 80%
How to unlock Nexus 6P&5X bootloader:
First phase on your Nexus 6P&5X:
Go to Settings > About Phone.
Enable Developer Options: Scroll down to Build Number and tap on it repeatedly until you see a notification informing you that you have enabled Developer Options.
Go back to the Settings menu > Bootloader Mode.
Scroll down and check the Enable OEM Unlock box.
Also, enable USB Debugging while you are in the Developer Options menu.
Now, turn your Nexus 6P off.
Boot into Fastboot mode: press Power + Volume Up + Volume Down keys until you see some text on the screen.
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Second phase on your PC / Mac:
Connect your Nexus 6P&5X to your computer using a USB cable.
Open a command prompt/Terminal from within your fastboot folder (where fastboot.exe is located – the android-sdk-windows\platform-tools directory). You can open the command prompt anywhere from this folder: Shift + Right-click > Open Command Prompt.
Check your Fastboot connection with this command:
If this command returns your device serial number, you can proceed to the next steps. If not, you need to reinstall your device drivers.
Now run the following command to unlock bootloader:
fastboot oem unlock
Follow the onscreen instructions and confirm bootloader unlocking.
Your Nexus 6P&5X will reboot itself. If not, issue the following command to reboot it:
Once done, you can disconnect the USB cable.
Remember, this erases all your data so it is highly recommended to unlock bootloader before you start using your device and installing millions of apps on it. Alternatively, you can always create a backup to restore to it after unlocking Nexus 6P&5X bootloader.