How to Unlock Bootloader On Sony Xperia Z5 PREMIUM using Official Method.

Unlock Bootloader On Sony Xperia Z5 PREMIUM. When you ready to install a new custom ROM on Sony Xperia device, exactly on Sony Xperia Z5 PREMIUM device. you'll first need to unlock the bootloader on this device. But, you need to know that unlock bootloader is not a recommended task for a standard user because it's not needed for normal usage. But now, Sony has released great software experiences through their rigorously tested and official software releases. You must be familiar with the risks involved if not, you should not proceed further to unlock the bootloader on Sony Xperia devices.

By unlocking your Sony Xperia device you may void the warranty of your Sony Xperia Z5 PREMIUM devices. You should be aware to be a response to all risk, and guidebelajar does not guarantee the full functionality, or to all risk for any unsigned custom ROM being flashed to your Sony Xperia Z5 PREMIUM device after the bootloader is unlocked.

Make sure your device is Sony Xperia Z5 PREMIUM to follow this instruction guide. Your Sony Xperia Z5 PREMIUM is the smartphone released on September 2015. with 5,5 Inchi wide IPS LCD capacitive touchscreen, 16M colors, work on Android OS, v5.1.1 (Lollipop), planned upgrade to v6.0 (Marshmallow) and supported with chipset Qualcomm MSM8994 Snapdragon 810, Processor Quad-core 1.5 GHz Cortex-A53 & Quad-core 2.0 GHz Cortex-A57, GPU Adreno 430, combined with 3 GB of RAM, 23 MP on primary camera and 5,1 MP on secondary camera.

Make sure your device is possible to unlock the bootloader using this guide, following the steps below to using service menu on your device :

1. Open dialer on your Sony Xperia Z5 PREMIUM device
2. Now enter *#*#7378423#*#* to access the service menu.

   

   dial *#*#7378423#*#*

3. Tap Service info > 
4. Tap Configuration > 
5. On Rooting Status, Bootloader unlock allowed should say Yes, 



Bootloader unlock allowed - sony xperia Z5 PREMIUM

Now, read the instruction guide below carefully to unlock the bootloader on Sony Xperia Z5 PREMIUM devices.

Unlock Bootloader On Sony Xperia Z5 PREMIUM.

Before you proceed to unlock the bootloader, please make sure you do a complete back-up of the system. Because unlock bootloader will force your device to factory reset or hard reset, this cause erases or delete or wipe your personal data account, a file stored, and the app installed on phone internal memory.  The factory reset will return the Sony Xperia Z5 PREMIUM device to the factory original condition. In addition, if you have enabled My Xperia, this function must be turned off before you can unlock your device. This is step by step of the tutorial :

1. After unlocking the bootloader on your Sony Xperia Z5 PREMIUM booting on this device at the first time may take a long time.
2. You must enable Developer Option on these devices, how to do it?
• Go to Settings
• Tap About phone
• Then on Build number tap seven (7) times to enable developer options.
3. Enable OEM Unlocking.
• Go to Settings, 
• Go into Developer options and enable OEM unlocking.
4. Then, Visit Sonymobile developer website, Here  
5. Scroll down this site, until you find the picture shown below.

   

   Unlock Bootloader On Sony Xperia Z5 PREMIUM

6. Now select your Xperia device on the drop-down menu, right here you must select Sony Xperia Z5 PREMIUM.

   

   Unlock Bootloader On Sony Xperia Z5 PREMIUM

7. And then click continue.
8. Now enter your valid Email Address to get email verifications.
9. Make sure to check term and conditions.
10. Now, Go to the inbox at your email account to proceed, and you will see the email like this.



Unlock Bootloader On Sony Xperia Z5 PREMIUM




11. To proceed to unlock your bootloader, just click text link: click here to proceed.
12. Now, Enter your IMEI, IDID or MEID number your Sony Xperia Z5 PREMIUM at the form. 
1. To view the IMEI number, you can also open the phone dialer on your device and enter *#06#.

   

   Enter IMEI - Unlock Bootloader On Sony Xperia Z5 PREMIUM

13. And then click Submit.
14. If you enter right IMEI, you will get your Unlock Code, this same like this picture.

    

    Unlock code - Unlock Bootloader On Sony Xperia Z5 PREMIUM

Install the Android SDK and the device drivers.

When you get Unlock Code, now you must install Android SDK on your computer, follow the next step here:

1. Download and install Android SDK, here 
2. If you using a windows computer, you need to download and install fastboot driver, Here 
3. For OSX or Linux, you are not required to install any additional drivers.
4. Then on your Sony Xperia Z5 PREMIUM device, turn on USB debugging by :
• Go to Settings > 
• Developer options and 
• Tap to enable USB debugging.

Connect Sony Xperia Z5 PREMIUM To Fastboot.

1. Turn Off your Sony Xperia Z5 PREMIUM device.
2. Then connect a USB-cable to your computer.
3. On your Sony Xperia Z5 PREMIUM, press the Volume up button at the same time as you connect the other end of the USB-cable.

   

   fast boot - Unlock Bootloader On Sony Xperia Z5 PREMIUM
4. For Windows users, when asked for a driver, point to the usb_driver folder where you placed the android_winusb.inf-file, and select the Android Boot loader Interface-file.
5. When your device is connected, open a command window on your computer and go to the platform-tools folder within the Android SDK folder.
6. Now, Enter the following command:

• fastboot devices

7. Make sure you have not any error message on this step.

Enter the Unlock Code.

1. This very crucial step for Sony Xperia Z5 PREMIUM warranty.
2. So,  If you still want to unlock the bootloader of your device, you can enter the following command :

• fastboot -i 0x0fce oem unlock 0x077C1E5A36F8AEC9

3. Which the bold number is your unlock code.
4. And, once again make sure there is no error message on your computer screen.
5. Done, You have now unlocked the bootloader of your Sony Xperia Z5 PREMIUM device

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