UNBRICKING AND UPGRADE DOWNGRADE GUIDE FOR ZENFONE 2

      Tutorial for Upgrade / Downgrade / Unbrick Zenfone 2

Guide only for WW ZE550ML / ZE551ML

Hi guys !!, today i will gave u the tutorial to:

- Downgrade Your Zenfone 2 Firmware Or Upgrade It Manually
- How To Reflash Your Phone ROM If You Stuck at USB LOGO (Boot Loop) At Your Zenfone 2

                    THIS IS WILL NOT VOID YOUR WARRANTY

REQUIRED FILES:-

ADB DRIVERS (HERE)

OTHER DRIVERS (HERE)


NOW THE FIRMWARE FOR YOUR DEVICE( ZE550ML=Z008/ZE551ML=Z00A)

RECOVERY.img(HERE)

ZENFONE 2 ZE550ML (HERE)

ZENFONE 2 ZE551ML (HERE)

HOW TO DO?

• Be sur to have 50% battery or more

• Download Recovery.img and Firmware of the same version

           Example: You want to install 2.15.40.10 [UL-Z00A-WW-2.15.40.10-user.zip] Version Of Firmware              Then You Should Download 2.15.40.10 recovery.img. The Version Of Recovery Image And                         Frimware Must Be Same!

• Install Usb Driver & Adb Driver

           Say "Yes" every time for Adb Driver Setup

• Copy 2.15.40.10 recovery image [recovery.img] and the firmware [UL-Z00A-XX-X.XX.XX.XX-user.zip] file to Adb folder > D:\adb\
• Activate the usb debugging on your Zenfone 2 > settings > about > software info > tap on the build number until the popup show that indicate you are in DEVELOPER OPTION " back to setting again now u will find developer options , click on it > switch it on there is a slider on top of the window > scroll down and u will find usb debug > check the box > popup showed click ok.
• Connect the phone to pc > the thing will pop up check the always allow and press allow on your  phone screen tick always allow if the PC is yours.

           If you do not see the popup, On adb cmd type adb devices (now you can see the popup and press             allow, if you type adb devices again you can see your device in adb window)

• Open adb folder and Shift + right click > Open Command pomport Here (click on it)
• On the adb cmd type adb reboot-bootloader
• After you enter the fastboot/droid boot, on the adb cmd type fastboot flash recovery <Recovery Image File Name.img>

           Example: fastboot flash recovery recovery.img

• After the recovery flash complete go to "recovery menu" and select on it, after you enter recovery navigate and select "update from adb"
• And type on adb cmd adb sideload <Firmware File.zip>
• Wait the for the process to complete the phone (~15MINS or MORE), if you have an auto reboot, you need to enter in the "boot loader" and select again"Recovery Mode"
• you can now select "wipe data/factory reset" (~10min)
• when is finish select "wipe cache partition" (~1min)
• and for the end select "reboot system now"
• The Boot process Will be Little Longer After This Process PLease Be Patient (~15min)
• Finish 

*Note This Tutorial Can Be Applied To This Cases : [U Want To Upgrade Your Zenfone 2 Or Downgrade It, Your Phone Has Soft Bricked (Boot Loop) And You Want To Fix It By Yourself]

How to Enter "Recovery Mode" on Asus Zenfone 2

• Turn Off your Zenfone 2
• Hold Power button + Volume up

• When the phone is vibrating release the Power button
• You can select "Normal Boot" or "Recovery Mode" by pressing Volume Up/Down, to enter Recovery choose "RECOVERY MODE"
• Then you will see sleep Android Robot, Press Power button and Volume up, after one second release the Volume up
• You will see Asus Zenfone 2 Recovery Mode

     

NOW YOU CAN DO YOUR DIRTY WORK WITH YOUR PHONE AND WHENEVER YOU WANT TO GO BACK TO YOUR STOCK FIRMWARE YOU CAN. ENJOY GUYS.