Guide to Flash Bricked - Bootloop LG G3 (LG D855P ATT) Using LG Flash Tool (KDZ method).

Flash LG G3 (LG D855P ATT). LG G3 (LG D855P ATT)  is the android smartphone which announced in May 2014, and excatly released on 2014, June. Guidebelajar on this guide will explain to you how to flashing android device on LG G3 (LG D855P ATT)   with easy and simple step. Flashing in android is the same way like fresh install on the windows PC, So by perform a flash on Android you will give a new performance like a new phone. One reason that you should perform a flash your android is because your android get bootloop or when you failed to install Stock ROM Mod. 

This LG G3 (LG D855P ATT) is the smartphone with 5,5 Inchi True HD-IPS + LCD capacitive touchscreen, 16M colors, work on Android OS, v4.4.2 (KitKat), upgradable to v6.0 (Marshmallow) and supported with Quad-core 2.5 GHz Krait 400 CPU, Qualcomm MSM8974AC Snapdragon 801 Chipset, combined with 2 GB of RAM and 13 MP of  Main camera and 2,1 MP on secondary camera. 

Now you can follow this guide if you have bootloop problems on LG G3 (LG D855P ATT)  but accidental LG G3 (LG D855P ATT) is not installed recovery. In this guide I'm not offering recovery twrp or Cwm. CMW is a recovery that already in recovery mode for customization of the device such that the LG G3 (LG D855P ATT)  with a variety of additional functions in it such as backup / restore, installations and others that are not contained in the standard recovery mode. Generally, in case of a default recovery bootloop LG G3 (LG D855P ATT)  will go missing in case of bootloop. whereas the original recvery can't help when there hardbrick.
Now, follow the isntruction list bellow, do it with your own risk.

Requirement Tool For Flash LG G3 (LG D855P ATT) .

Before you perform flash or install your firmware on LG G3 (LG D855P ATT) ,
you must download all requirement tool below ;

1. Download Stock Rom LG G3 (LG D855P ATT).
• This Stock is KDZ file, remember to copy this KDZ file into LG Flash Tool 2014 folder
• Check the firmware that match with your phone version, for ATT, below
• LG D855P Version D85510C_00 Here
• LG D855P Version D85520A_00 Here
• LG D855P Version D85520A_00 Here
• You can also downlaod KDZ firmware for Leap Wireless, below
• LG D855P Version D85510C_00 Here
• LG D855P Version D85520A_00 Here
• LG D855P Version D85520A_00 Here
2. Download Driver LG: Here
3. Latest LG FlashTool : Here

#1. Guide To Flash LG G3 (LG D855P ATT)

Please follow this guide carefully to flash LG G3 (LG D855P ATT) .

1. Make sure you have download all requirement tool above
2. Then Install the drivers with your phone connected with your Computer, when it finished disconnect your LG G3 (LG D855P ATT) phone from your computer.
3. Now turn your LG G3 (LG D855P ATT) phone off, then continuously click on the volume up button and connect your phone to your PC, 
4. Now, enter your LG G3 (LG D855P ATT) into download mode.  ( visit this guide or see at the end of this post)
5. Run LGFlashTool2014.exe.
6. If you cannot run LGFlashTool2014.exe, You must install Visual C++ Runtime Library, get here
7. There are two options to flash your LG G3 (LG D855P ATT) .
• Normal Flash : You can select this option if you want Flash ROM without losing any data. Only use this when you need to fix system error.
• CSE Flash : You can choose this option when you need a fresh format. All data will be deleted. It's suitable for upgrading or downgrading ROM or simply use this when you need to back to Stock. 

  

  LG flash tool normal flash / CSE flash

8. Select Type: CDMA
9. PhoneMode: DIAG
10. Select KDZ file : browse your KDZ file in your drive
11. Then you can Click on Normal Flash or CSE Flash (see step 7 to decide this option)
12. Then click Start.

    

    LG flash tool - start

13. Then click on Clear Phone Software update registry.

    

    Lg flash tool - Clear Phone Software update registry.

14. No need to choose desired language, it automatically change to English as a default setting.
15. Finally you can click OK.
16. You must wait a minute for the LG Mobile Support tool to recognize the LG G3 (LG D855P ATT)  device.
17. When you wait this process, may take 5 minute the tool to recognize it.
18. The software will start the extraction on your device.
19. When the process reach 100% your LG G3 (LG D855P ATT)  will reboot.
20. Then, you must Unplug your LG G3 (LG D855P ATT)  from your computer by remove USB Cable from it.,
21. Finish,

#2. Guide To Flash LG G3 (LG D855P ATT)

If #1 method is failed to flash your LG Android device, you can use this second method, flashing LG device using R&D Test Tool

Enter LG G3 (LG D855P ATT) To Download Mode.

To enter LG LG G3 (LG D855P ATT) in download mode, you can follow this guide :

1. Remove batterei from your phone
2. Plug USB cable to your PC
3. Press and Hold volume UP Button, while cable plugs USB Cable from PC to your Phone
4. Then will appear white note on your LG G3 (LG D855P ATT)  phone, if you see this you can releasa Volume UP button.
5. Press and hold volume UP Button on your LG G3 (LG D855P ATT)  phone again, until you see FIRMWARE UPDATE message.
6. If your phone has been detected in your PC (to make sure, click the monitor icon beside Read Phone Information button, this action will open device manager windows. If your phone was detected you can see this at the top)
7. Click START, and you will see dialogue box, just click OK
8. Wait for the flash process, it will run in approximately 5 minute and your LG G3 (LG D855P ATT)  will restart itself
9. Then your LG G3 (LG D855P ATT)  phone will boot up, if you can see Welcome Screen, it's mean Flashing process is successfully.
10. Unplug USB cable, and finish
11. Now your LG G3 (LG D855P ATT)  is installed new firmware.

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