[Asus Zenfone Selfie Guides, News, & Discussion] nebojsa986:
I had to fix a couple of bricked selfie phones (z00ud and z00udb but i assume this works on any selfie zd551kl model), that were probably bricked by autoflashing wrong firmware, so after spending a few days going thru many different tutorials, this is my tested method on how to fix them (or if you wanna get a cheap phone from taobao and turn it into a decent one), obviously it wasn't extensively tested, so take it as is ;). Some steps MIGHT be unnecessary but i didn't want to skip them as i was just glad i found a way how to get the phones to completely stable, latest firmware from useless paperweight.

A. if fone doesnt accept any firmware,or bricked,bootlooped etc. flash basic CN firmware, regardless is recovery WW or CN

- Instructions:

1. go to phone recovery (PWR button + VolDwn, release PWR on logo)

2. on phone select adb bootloader, it switches to fastboot mode (or hold PWR button + VolUp, release PWR on logo)

3. on PC unzip archive and start the autoflash .bat file

4. start the phone

files

: archive (Asus Zenfone Selfie Z00UDB ZD551KL 3+16 here )

B. upgrade CN/WW firmare to latest version

- Instructions:

1. on PC install adb drivers

2. go to phone recovery (PWR button + VolDwn, release PWR on logo)

3. on phone select adb sideload

4. on PC, copy firmwares into adb folder

5. on PC go to adb folder and start cmd in that folder (shift+Rclk)

6. type adb devices to check connection, then adb sideload firmwarename.zip

7. start the phone

8. repeat all steps until latest CN/WW firmware is installed

files:

adb drivers adb-setup-1.4.3 here , firmwares here(UL-Z00T-CN-1.13.40.661-user,UL-Z00T-CN-1.14.40.695-user,UL-Z00T-CN-1.15.40.1548-user)

C.swap CN firmware for WW, upgrade to Android 6

- Instructions: (also someone elses crappy YT video instructions here )

1. on PC install vc x86 and x64 redist packages for 2010,2012,2013 to prevent .ddl missing errors when running flashtool

1. on PC install asus flash tool

3. on fone turn on usb debugging in developer settings (click on about>sw info>build number)

4. turn off fone then start it in fastboot mode (hold PWR button + VolUp, release PWR on logo)

5. connect the fone to PC, start the autoflash .bat file from the firmware folder (CSC_ZD550KL_1_2_0_70_fac_eng_20150905_secure)

6. disconnect usb, wait for fone to reboot, then disconnect the battery on boot logo (remove back cover in advance)

7. return the battery, and start the fone again in fastboot mode, check for extra info on screen

8. on PC start the flashtool, connect the fone in fastboot mode, check if connected, select the model (ZD551KL), select wipe data

9. on PC, browse to firmware (WW_ZD551KL_1.15.40.1582-bsp-user-20160510203701-secured-release) in flashtool, click start, chose Yes for both options (wipe and image promt), wait until flashing is over

10. disconnect and start the fone

11. connect the fone to PC, copy the firmware (UL-Z00T-WW-21.40.0.1692-user) to internal memory or SD card and wait for the fone to recognize the package and auto-update to Android 6

12. connect the fone to PC, copy any newer firmware to internal memory or SD card (no need to copy next iteration or 2156 build, you can go to for ex. 2214 build right away) wait for the fone to recognize the package and auto-update to newer build of Android 6

files:

vc redist packages here , firmwares (WW_ZD551KL_1.15.40.1582-bsp-user-20160510203701-secured-release here,CSC_ZD550KL_1_2_0_70_fac_eng_20150905_secure here), Android 6 firmwares here