[Zenfone 5 Q&A, Help & Troubleshooting] vaibhavnarain11@gmail.com:
You may be have got attracted to those new roms out there on the internet and would have probably bricked your device.Or maybe did some modding and in worst case somehow your phone bootlooped.

so please follow the guide for unbricking or solving bootloop issues:

CAUTION:

[1] FIRST OF ALL, I AM NOT RESPONSIBLE FOR ANY DAMAGE TO YOUR DEVICE.

[2] NEVER UNPLUG THE USB CABLE WHILE FLASHING IS IN PROGRESS.IT MIGHT PERMANENTLY BRICK UR DEVICE..

ONLY FOR ZENFONE 5,A501CG/00CG

download the required files:

[1] kitkat firmware: for zenfone5(a501cg/00cg only other zf5 users download appropriate firmware from asus support page): http://dlcdnet.asus.com/pub/ASUS/ZenFone/A500CG/UL-ASUS_T00F-WW-2.21.40.44-user.zip

[2] adb/fastboot files: from here

[3] device drivers:if you do not have device drivers download and install pc link on pc from asus website,it will automatically install device drivers on your pc.(download from: http://liveupdate01.asus.com/pub/ASUS/LiveUpdate/Release/ZenFone/APP/LinkRim/PCLinkSetup.exe)

IF U R BRICKED PROCEED FROM STEP 2 ELSE FOR BOOTLOOP START FROM STEP 1:

step 1] try booting into recovery and perform a factory rest and wipe cache if this solves the bootloop(in most cases it should).if it still bootloops then follow the following tutorial

step 2]extract the fastboot files on the desktop and paste the firmware(it will be in .zip)in the fastboot folder

step 3]after copying the firmware also extract and copy the recovery.img and fastboot.img file from the firmware into the fastboot folder. (don't remove original firmware zip)

now your fastbootfolder should contain fastboot files+recovery.img+fastboot.img+firmware you dowloaded(compressed in .zip)

step4]boot into the fastboot by switching off the phone and powering it on by power+vol up key until asus logo comes up

if u r returning from some other rom u need to relock the bootloader so scroll some below to see how to relockbootloader.

step5]once you booted to fastboot ,open command promt in fastboot folder (downloaded earlier) by pressing right click+shift in any blank space on folder screen and selecting open command promt here.

in cmd write:

step6]

fastboot flash fastboot fastboot.img

step7] fastboot reboot-bootloader

wait until reboot is complete then write

step8]

fastboot flash recovery recovery.img
fastboot reboot-bootloader

step9] now we will be erasing data and cache for a clean flashing

fastboot clear data
fastboot clear cache

both of them take time and screen may turn off to save power so don't panic :D

next use volume keys to navigate to recovery and select it using power key .once your phone boots up showing android with belly open symbol press and hold volume up+volume down until recovery menu appears.if that does not open recovery try this:

hold volume down button, click and release vol up button,,,then finally release vol down button.

i admit it brothers,,it is sometimes really difficult to boot into recovery...but keep trying,,it is a bit difficult but is fruitful

if it doesnt appears it may be due to unssucceful flashing, unplug usb cable,force switch off phone by holding power button for few seconds.now again boot in bootloader by power button and vol up key and repeat from :step[8]

once in recovery select apply update from adb

step10] write on cmd

adb sideload <downloaded firmware name>.zip

for convenience you can rename firmware to kk.zip or any thing you like so command will be adb sideload kk.zip(it may take 15 to 20 mins)

step 11]once thats done select wipe data and cache in recovery and at last select reboot from recovery menu(dont skip this else you may face freezing on welcome screen itself)

hopefully you will boot into homescreen and be patient first bootup may take upto 20 mins.

[UPDATE] HOW TO RELOCK BOOTLOADER{only for zenfone 5 other device users pls google the procedure}

(USE THIS ONLY IF U R RETURNING FROM ANY CUSTOM ROM ITS NOT NEEDED FOR BOOTLOOPING PROBLEM)

hi guys i know u will be needing to relock the bootloader while returning to stock rom..

so what u have do is use the following steps before flashing fastboot.img that is before STEP [5] mentioned above

[1] download this file (its a zip file extract it using password zenfone-five.blogspot.com)...(link=https://drive.google.com/file/d/0B0o7qWuG7vvVRE9CV0hJWGRJS2c/view?usp=sharing)

[2]follow the on screen instructions

after the bootloader is locked carry on the steps from step[5]

PLEASE NOTE---THE UNLOCKING/LOCKING TOOL PROVIDED ABOVE IS NIETHER WRITTEN NOR OWNED BY ME...ALL CREDIT GOES TO ITS RESPECTIVE DEVELOPERS

this method can be used for:

1]unbricking

2]returning to stock rom

3]bootloop issues

IF YOU ARE NOT ABLE TO BOOT INTO FASTBOOT(maybe stuck on usb logo)--see this: http://www.asus.com/zentalk/forum.php?mod=viewthread&tid=33800 it is written by asus guys and will help you

thanks

if you face any issue please ask in comments...........

sources and credits===== www.windroidica.in

SCREENSHOTS DISCRIPTION:

pic 1] sideloading in progress

pic 2] the screen you will get when u will perform step [10] ( ignore the error "can't open /tmp/update-script.log")

pic 3]sideloading in progress (ignore the error: "please upgrade to newest 4.3 first")

pic 4] sideloading complete

NOT HITTING THANKS WILL LEAD TO A ZOMBIE APOCLYPSE(JUST KIDDING) ........dont forget to hit thanks!!!!

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