[Asus ZenFone 3 Zoom Guides, News, & Discussion] vincom:
MANUALLY INSTALLING FULL NOUGAT 7.11 FIRMWARE 2018/03/15(security_patch 2018-02-05) (RECOVERY, BOOT, SYSTEM) Even If Its Soft Bricked Because You Messed Up Somewhere. Files Here Are For Asus Zenfone 3 Zoom ZE553KL Z01HD WW Sku .

Its The Last Nougat Update Before Oreo Was Released.

MORE FIRWARES HERE

Story Time:

As I Remember It.....Condensed Version, This Was Over A Few Days Of Trial And Error, Mainly Because Adb SideLoad Refused To Flash Asus's Stock Firmware Zip Files.

I Messed Up My Friends Asus Zenfone 3 Zoom, ZE553KL.

He Bought Used, He Quickly Updated To Oreo From Within The Phones Update But Was Having Missed Texts And Slow Lte(4g) Speeds, He Wasnt Sure If It Happened On Nougat Which The Phone Was On Originally.

Downgraded To 6.01, Installed Twrp, Magisk, Still Having Same Issues, Flashing An Update Zip W/a Modded Updater Script Via Twrp Caused A Soft Bricked Phone, It Never Completed The Flash, Twrp Backup Didnt Work, Factory Reset A No Go, Couldn't Manually Flash Stock Rom As Adb Sideload Always Gave Errors, Fastboot System images Didnt Help For One Reason Or Another, Phone Was Just Bootlooping Back To The Unlocked Bootloader Menu.

Down Loaded Alot Of Stuff, Read Countless Pages, And Somehow Got The Right Firmware Files(recovery, boot, system img files) That Was Flashable Via Fastboot Extracted From A Zip, My Fix Is Below. These Are Not My Files But I Cant Remember Where I Got Them From As I Dl-ed Alot Of Stuff Trying To Get This Phone To A Running State. No I Havent Tried Oreo Yet, He Has His Phone Back Now And Not Sure When He'll Let Me Play With It Again, Lol.

UPDATE TO THIS STORY

HOWTO FLASH

PREREQUISITES:

Make A Nandroid Backup

If Bootable Remove/Signout Of Google Account

(Might Work With Locked Bootloader, IDK)

Ze553kl(Zenfone3 Zoom) Phone With Unlocked Bootloader(used unlocker apk from asus website when phone was in running state)

Unlocking Bootloader App Available From Asus - was for upto nougat 7.11

Usb Asus Drivers

Usb Debugging Enabled On Phone, Maybe Not But Wont Hurt To Try

Adb Fastboot Program(Included)

Recovery, Boot, And System Img Files Of Nougat 7.11(Included)

Computer Running Windows

Usb Data Cable For Phone

ON PHONE-

If Bootable Enable Usb Debugging, Uncheck Verify Apps Via Usb, Install From Unknown Sources, Remove Google Account

Backup Internal Sdcard - Most Def

Remove Sdcard, Just In Case

Put Phone Into Fast Boot Mode- Unplugged, Phone Powered Off - Vol Up + Power Button Pressed, Hold Both Until Screen Comes On.

Plug Usb In Cable To Phone From Pc.

ON COMPUTER-

From The Download Section Below Dl ADB_FASTBOOT_1.4.1.ZIP File And Extract It Into A New Empty Folder.

Download And Copy The Three .Img Files From The Download Section Below Into This New Adb Folder

HOW TO RUN ADB VIA COMMAND PROMPT? -

From Within Adb-fastboot Folder You Created, Nothing Selected, Hold Down The Shift Key Then Use The Right Mouse Button To Click In Empty Space In The Adb-fastboot Folder, Select "Open Command Window Here" From The Menu That Pops Up.

From Within Command Prompt Type-

Adb Devices

It Should Output A Device With A String Of Letters And Numbers, Thats Your Phone.

Next Steps Will Install Nougat 7.11 And Consequently Wipe Your Phone

Run These 5 "fastboot" Commands One At A Time.

When Each Step Is Completed Run The Next Command, You Can Copy And Paste These Five (5) Fastboot Commands Into The Command Prompt Window

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1.

fastboot flash recovery recovery-zoom-7.11.img

2.

fastboot flash boot boot-zoom-7.11.img

3.

this one @ ~4gb will take awhile to initialize and complete, patience needed

CAN REDO THIS SYSTEM FLASH NOW TO MAKE SURE IT "STICKS"

fastboot flash system system-zoom-7.11.img

4.

wipes internal sdcard

fastboot format userdata

5.

fastboot reboot

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if you were successfull it will boot into 7.11, takes about 3-5 mins to boot.

IF DID NOT FLASH PROPERLY OR ODD BEHAVIOR AFTER REBOOT THEN REDO STEPS AGAIN....ELSE KEEP READING!

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IF STILL BRICKED OR ODD BEHAVIOR BUT CAN BOOT TO BOOTLOADER/FASTBOOT THEN DO THESE COMMANDS WHEN IN FASTBOOT MODE

fastboot erase system
fastboot erase recovery
fastboot erase boot
fastboot erase userdata
fastboot -w
fastboot erase splash
fastboot erase cache

THEN

RE-BOOT

BACK INTO BOOTLOADER AND DO THE FLASH FOR 7.11 FIRMWARE

STILL HAVING ISSUES, RESTORE USING TECH FW THAT REFLASHES ALL MDMS, RADIOS, DRIVERS ETC FROM HERE

[FW] 7.1.1 & 6.0.1 Service Tech Firmwares - Debrick - Upgrade - Downgrade

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disclaimer im not responsible for yours or anyone elses devices, do at your own risk

DOWNLOADS

PHONE FILES ARE FROM A Asus Zenfone 3 Zoom ZE553KL WW SKU FIRMWARE Version WW-71.60.139.30 2018/03/15

RECOVERY-ZOOM-7.11.IMG

md5 03d8358e1341a73b5a492c12e3dbe39e

BOOT-ZOOM-7.11.IMG

md5 1ad55f9852d56b79a95654173af5649a

SYSTEM-ZOOM-7.11.IMG

md5 7217f778701c988271739ab18fb0fb30

ADB_FASTBOOT_1.4.1.ZIP

..