[ZenFone 2 Q&A, Help & Troubleshooting] gopzzz:
This a smple guide to

Change the CN sku to WW sku and also to flash prerooted firmware....

There are 3 methods to flash firmware:

a. Fastboot method - using ADB cmd in fastboot mode - described below - most common and definitive

b. Sideload ADB method - into recovery and using adb cmd method - incases where the above method is at fault or difficult

c. OTA method - by flashing or by copying in the phone storage and allowing it to perform like OTA update

FASTBOOT method:

Pre rooted firmware version used is PREROOTED 2.15.40.10 by the gret and devoted Shakalaca

Step by step instructions to flash firmwares in Zenfone 2:

Note: tested and verified in ZE551ml 32gb/4gb 1.8ghz model.

Thanks to

1.	Shakalaca for the great effort and work for firmware

2.	Vivix – for making it simple

3.	Chinaphonearena for the support and files

4. All XDians for support and help

Requirements:

1.	Laptop/PC with windows

2.	Zenfone 2 Z00A model

3.	Downloaded files – 4 files of app 1.3gb data volume – link given below

4.	Micro usb cable to connect to pc/ laptop

5.	TIME & PATIENTS

Steps:

In Computer:

a.	Download Flashtools.zip from here.. https://mega.co.nz/#!2VU1RS6J!a7bgeAbyRQpECFdLtm-RDNKNpybhWGT7xUu5TXqvxXk

b.	Download recovery.img from here https://mega.co.nz/#!DdlChA7B!x-Tnaf_6fCo-3xSWRFIAZCr6BGGledQcLiw7Fk7WvuM

c.	Download boot.img from here… https://mega.co.nz/#!GF1EhCRI!s-RKUTsMwwcxcmRNrr8oEBk2IeDYIY4D1Nr7HUP-3rI

d.	Download system.img in system.rar file from here…https://mega.co.nz/#!CN9jDLhY!rKB0ekicCXeo5YMMVkSxW1Kt_ty_b9k3YDyTRmw2bTg

System.rar ----- md5 -------b3574fffb1fa135e237b483522e269ac

System.img ------ md5-------d92ddf4030ae6cef081ac732f668c5f7

Steps:

1.	In PC/Laptop: Unzip the flashtools.zip files in a separate new folder.. as below

https://mega.co.nz/#!vV0ghLYb!h0kMVg-S9RAM2a-uEkeBcfLemmDlXYClfG40NZ4PHHM

2.	COPY the files recovery.img and boot.img into this same folder… flashtools

3.	Unzip the system.rar file and place the system.img file into the same folder… flashtools

4.	At this stage, the folder should have all the files of flashtools along with boot.img, recovery.img and system.img

5.

In zenfone

a.	Switch off the phone and remove the SD card if any ( SD card is removed for prevention of SD card data and is purely

OPTIONAL

)

b.	Boot into fastboot mode by following the sequence…..

- Switched off phone HOLD VOL UP button first followed by POWER button

- WAIT till you feel the VIBRATION, then leave ( remove the finger) the power button and continue holding the volume up button [ do not leave the vol up button – if you leave it will boot into android as normal]

- Continue holding the vol up button until you see 2/3 flickers and FASTBOOT menu

- On seeing the fastboot menu, release the vol up button and place it near the laptop/computer

- CONNECT the data cable and wait until it installs the required files ( Similar to inserting a new USB flash drive)

- Once done CONNECTED zenfone 2 Is ready for flashing

6. In PC / Laptop

a.	Open the folder flashtools

b.	Press shift + right click to open the dialogue drop box…

c.	Select “open command Window here”

d.	Once clicked will open the cmd window like this

https://mega.co.nz/#!7QkEnJ5T!aRkWi6QSvSbeCTtTvoh7Sgb2CG9-fgqzxkTqS7szMbY

e.	Now start typing

fastboot flash recovery recovery.img

wait… look into the phone screen… it will say completed

fastboot flash boot boot.img

wait…. Look into the phone screen … once completed

fastboot flash system system.img

wait… it will happen in parts… maybe 5/6 parts….. once completed …. Done

DISCONNECT the phone from PC and press power button… it will switch on and start to boot into new firmware…. Until you wait… Have a CUP of TEA… and enjoy ur Zenfone 2

HIT THANKS if this was useful for you....