[Full Firmware] Zenfone 2 ZE550ML V2.20.40.135

 

How to OTA update ? (Go to settings>About>System Update>Check for Update)
How to update Manual ? Place to Internal Storage>Restart>Click Update
How to update via ADB sideload ? Here 

Download only FOTA Files Here
 

ZENFONE 2 ZE550ML Z008 firmware: 
WW VERSION
Version WW-2.20.40.135  (WW) 
 

Description

Release Note ASUS ZenFone 2=ZE550ML software Image: V2.20.40.135 for WW SKU only* Improvement Item: 1)Several Apps update 2)Fix icon display issue in Settings 3)Improve the stability of Snap View 4)Improve the stability of Lockscreen 5)Improve the stability of Camera  6)Fixed WiFi Hotspot issue 7)Fixed Data transmission issue 8)Fixed Bluetooth transmission issue 9)Fixed SD card related issue 10)Extend the shutdown mimunes by power key press 11)Improve the compatibility of apps 12)Fixed calling issue in Singapore 13)Fixed 3G cannot camp to H plus in some countries 14)Support Zawgyi Myanmar string translation 15)Move Screenshot settings to the first layer 16)Allow Clean Master S key to be uninstalled 17)Improve ringtone chooser stability 18)Improve the stability of Email App 19)Modify Italy PosteMobile MMS APN setting issue New add: 1)Add Game Center 2)Add new wallpaper 3)Add Theme Store For more information please refer to: TW：http://www.asus.com/zentalk/tw/ReleaseNotes WW：http://www.asus.com/zentalk/ReleaseNotes CN：http://zentalk.asus.com.cn/ReleaseNotes Steps of Update: 1. Check software version of your device** 2. Download device software and Update SOP (From “Manual” Item) 3. Only apply to same SKU update, Example: WW->WW, CN->CN, . 4. Software update cannot transfer the software SKU and downgrade the software version. 5. Wrong SKU may cause update failure, please update the same SKU version only. *How to know the device model? Path: Settings->About-> Model number Example: ASUS_T00I **How to know the device software version? Path: Settings->About-> software information->Build number ***System upgrade may cause part of data missing, please buckup your important data before system upgrading.

File Size	1.09 GB                                                2015.12.24  update
Download from	Global

[Full Firmware] Zenfone 2 ZE551ML V2.20.40.156

 

How to OTA update ? (Go to settings>About>System Update>Check for Update)
How to update Manual ? Place to Internal Storage>Restart>Click Update
How to update via ADB sideload ? Here 

Download only FOTA Files Here
 

ZENFONE 2 ZE551ML Z00A firmware: 
WW VERSION
Version V2.20.40.156 (WW)
 

Description

Release Note ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.20.40.156 for WW SKU only* Improvement Item: 1)Several Apps update 2)Fix icon display issue in Settings 3)Improve the stability of Snap View 4)Improve the stability of Lockscreen 5)Improve the stability of Camera  6)Fixed WiFi Hotspot issue 7)Fixed Data transmission issue 8)Fixed Bluetooth transmission issue 9)Fixed SD card related issue 10)Extend the shutdown mimunes by power key press 11)Improve the compatibility of apps 12)Fixed calling issue in Singapore 13)Fixed 3G cannot camp to H plus in some countries 14)Support Zawgyi Myanmar string translation 15)Move Screenshot settings to the first layer 16)Allow Clean Master S key to be uninstalled 17)Improve ringtone chooser stability 18)Improve the stability of Email App 19)Modify Italy PosteMobile MMS APN setting issue New add: 1)Add Game Center 2)Add new wallpaper 3)Add Theme Store For more information please refer to: TW：http://www.asus.com/zentalk/tw/ReleaseNotes WW：http://www.asus.com/zentalk/ReleaseNotes CN：http://zentalk.asus.com.cn/ReleaseNotes Steps of Update: 1. Check software version of your device** 2. Download device software and Update SOP (From “Manual” Item) 3. Only apply to same SKU update, Example: WW->WW, CN->CN, . 4. Software update cannot transfer the software SKU and downgrade the software version. 5. Wrong SKU may cause update failure, please update the same SKU version only. *How to know the device model? Path: Settings->About-> Model number Example: ASUS_T00I **How to know the device software version? Path: Settings->About-> software information->Build number ***System upgrade may cause part of data missing, please buckup your important data before system upgrading.

File Size	1.13GB                                                                2015.12.24 update
Download from	Global

How to Downgrade ASUS ZenFone 2 Firmware

Yesterday ASUS gave us recent update in ZenFone 2 ZE551ML 2.20.40.156 and ZenFone 2 ZE550ML 2.20.40.135. Personally I don't like this update because Now I can't use third party Themes, which you must download from Theme Store for free/paid themes from ZenUI designer and I don't see any good themes except Speed Themes :). This tutorial is applicable for Downgrading Firmware or even back to stock rom. Please do it carefully and DWYOR (Do it with your own risk) because wrong move may cause the device brick :)

Resources:

1. ADB Fastboot Installer (Download Here if you don't have it)
2. ZenFone 2 Original Recovery.img, bootloader.img, boot.img (ZE551ML | ZE550ML)
3. ZenFone Firmware (ZE551ML | ZE550ML) <-select OS Android and download your firmware

How to Downgrade ASUS Zenfone 2 :

1. In this tutorial I will downgrade from 2.20.40.156 to 2.20.40.139
2. Download ADB and Install it
3. Download Recovery.img, bootloader.img, boot.img (lower version than your current version)->I download 2.20.40.97 - must lower than 2.20.40.156
4. Download Firmware (lower version than your current version) -> I download 2.20.40.139 version
5. Place Recovery.img, bootloader.img, boot.img to Downgrade Folder
   
6. Go to Fastboot Mode (Turn off device and press power+volume up) or conncet the device to pc/laptop at downgrade folder press shift+right click -> open command here and type adb reboot bootloader (need usb debugging activated)
   
7. Connect your Zenfone 2 to PC/Laptop
8. Type on CMD (press enter after each line):
fastboot flash fastboot droidboot.img
fastboot flash recovery recovery.img
fastboot flash boot boot.img
9. Enter recovery (Tutorial Here)
10. Select Apply update from adb
11. Open Ze551ml firmware folder and press shift+right click > open command here
12. Connect your Zenfone 2 to PC/Laptop
13. Type on CMD (press enter after each line):
adb sideload UL-Z00A-WW-2.20.40.139-user.zip
14. Factory Reset (To avoid a crash error, but not perform factory reset is ok)
15. Done

ASUS Zenfone 2 Laser Unlock Bootloader Tool

What is a bootloader? At its most basic level, your Android smartphone is like a hard drive, made of up several partitions. One of those partitions holds the Android system files, another holds all the app data you accumulate (which is how you're usually able to update without losing all your stuff), and others to do more behind-the scenes stuff. 

Think of the bootloader as a security checkpoint for all those partitions. Because if you're able to swap out what's on those partitions, you're able to break things if you don't know what you're doing. Or, with a little hackery, you're able to run custom ROMs.

Zenfone 2 Laser Official Unlock Bootloader tool v1.0

 
 ZE550KL

Description

Unlock Device App: Unlock boot loader  Notice:  1. Update your software image to v1.16.40.763 or latest version  2. Before you download, install, and use the Unlock Device App you acknowledge and assume complete risk to the quality and performance of this App, including but not limited to the following: once you activate the App you will not be able to recover your ASUS product (“Original Product”) back to original locked conditions; the Original Product with the activated App will not be deemed the Original Product; the Revised Product will no longer be covered under the warranty of the Original Product; the software of Revised Product will no longer be deemed the software of the Original Product and can no longer receive ASUS software updates; your purchased digital content may also be affected.  You also acknowledge ASUS does not guarantee service satisfaction to any Revised Product, including events involving paid service requested by you to be performed to the Revised Product. Furthermore, such repaired Revised Product will not be covered under the warranty of the Original Product; the software of the repaired Revised Product will not be deemed the software of the Original Product and will not receive ASUS software updates. It is strongly advised that you avoid activating this App unless you fully understand and accept the risks that may arise.

File Size	734.6 KB
Download from	Google Drive

 ZE600KL

Description

Unlock Device App: Unlock boot loader  Notice:  1. Update your software image to V1.15.40.771 or latest version  2. Before you download, install, and use the Unlock Device App you acknowledge and assume complete risk to the quality and performance of this App, including but not limited to the following: once you activate the App you will not be able to recover your ASUS product (“Original Product”) back to original locked conditions; the Original Product with the activated App will not be deemed the Original Product; the Revised Product will no longer be covered under the warranty of the Original Product; the software of Revised Product will no longer be deemed the software of the Original Product and can no longer receive ASUS software updates; your purchased digital content may also be affected.  You also acknowledge ASUS does not guarantee service satisfaction to any Revised Product, including events involving paid service requested by you to be performed to the Revised Product. Furthermore, such repaired Revised Product will not be covered under the warranty of the Original Product; the software of the repaired Revised Product will not be deemed the software of the Original Product and will not receive ASUS software updates. It is strongly advised that you avoid activating this App unless you fully understand and accept the risks that may arise.

File Size	1.94 MBps
Download from	Global

ZE601KL

Description

Unlock Device App: Unlock boot loader  Notice:  1. Update your software image to V1.15.40.770 or latest version  2. Before you download, install, and use the Unlock Device App you acknowledge and assume complete risk to the quality and performance of this App, including but not limited to the following: once you activate the App you will not be able to recover your ASUS product (“Original Product”) back to original locked conditions; the Original Product with the activated App will not be deemed the Original Product; the Revised Product will no longer be covered under the warranty of the Original Product; the software of Revised Product will no longer be deemed the software of the Original Product and can no longer receive ASUS software updates; your purchased digital content may also be affected.  You also acknowledge ASUS does not guarantee service satisfaction to any Revised Product, including events involving paid service requested by you to be performed to the Revised Product. Furthermore, such repaired Revised Product will not be covered under the warranty of the Original Product; the software of the repaired Revised Product will not be deemed the software of the Original Product and will not receive ASUS software updates. It is strongly advised that you avoid activating this App unless you fully understand and accept the risks that may arise.

File Size	1.94 MBps
Download from	Global

ZE551KL

Description

Unlock Device App: Unlock boot loader  Notice:  1. Update your software image to V1.16.40.763 or latest version  2. Before you download, install, and use the Unlock Device App you acknowledge and assume complete risk to the quality and performance of this App, including but not limited to the following: once you activate the App you will not be able to recover your ASUS product (“Original Product”) back to original locked conditions; the Original Product with the activated App will not be deemed the Original Product; the Revised Product will no longer be covered under the warranty of the Original Product; the software of Revised Product will no longer be deemed the software of the Original Product and can no longer receive ASUS software updates; your purchased digital content may also be affected.  You also acknowledge ASUS does not guarantee service satisfaction to any Revised Product, including events involving paid service requested by you to be performed to the Revised Product. Furthermore, such repaired Revised Product will not be covered under the warranty of the Original Product; the software of the repaired Revised Product will not be deemed the software of the Original Product and will not receive ASUS software updates. It is strongly advised that you avoid activating this App unless you fully understand and accept the risks that may arise.

File Size	1.94 MBps
Download from	Global

Download ASUS Flashtool 1.0.0.14 for Windows

ASUS Flashtool is a program for flashing ASUS Device, including Zenfone series. In ASUS Flashtool 1.0.0.14 have more supported device. To perform ASUS flashtool you need RAW firmware.

ASUS Flashtool 1.0.0.14 Supported Device list:
A11
A68M
A91
A400CG
A450CG
A500CG
A501CG
A502CG
A500KL
A600CG
A601CG
FE170CG
FE171CG
FE171MG
FE375CG
FE375CXG
FE375CL
FE380CG
FE380CXG
ME70C
ME70CX
ME103K
ME170C
ME171C
ME175CG
ME176C
ME176CE
ME176CX
ME181C
ME181CX
ME372CG
ME372CL
ME375CL
ME560CG
ME572C
ME572CL
ME581C
ME581CL
ME7530CL
PF400CG
PF400CL
PF451CL
PF500KL
TF103C
TF103CE
TF103CG
TF303CL
TF303K
Z170C
Z170CG
Z370C
Z370CG
Z580C
Z580CA
Z451CG
ZE500CL
ZE500KG
ZE500KL
ZE550ML
ZE551ML

How to Use ASUS Flash tool can be read Here : http://www.asus-zenfone.com/2014/09/asus-flashtool-installer-for-zenfone.html

Download ASUS Flashtool 1.0.0.14: 

ASUS Flashtool 1.0.0.14(Pass: www.asus-zenfone.com)

Download RAW Firmware for ASUS Flashtool :

RAW Firmware for ASUS Zenfone 2
Pass: www.asus-zenfone.com

Another Zenfone can be Download here:

http://www.asus-zenfone.com/search/label/RAW

How to Re-Lock Bootloader ASUS Zenfone 2

The trouble after unlock bootloader : Furthermore, such repaired Revised Product will not be covered under the warranty of the Original Product; the software of the repaired Revised Product will not be deemed the software of the Original Product and will not receive ASUS software updates. But we can re-lock the bootloader :D

DWYOR (Do it with your own risks)

Download Resources for Re-lock Bootloader :

1. ASUS Zenfone 2 RAW file (ZE551ML) (Download)(Pass: www.asus-zenfone.com)
2. ASUS Flash Tool 1.14 (Download)(Pass: www.asus-zenfone.com)
3. Download recovery.img, boot.img, droidboot.img (Download)

How to Re-Lock Bootloader:

1. Download files above
2. Install ASUS Flash Tool on your Computer/Laptop
3. Reboot your Zenfone 2 to bootloader (Power+volume up or Here)
4. Open Asus Flash Tool apps
5. Select Model Zenfone 2/ ZE551ML on Drop down menu
6. Select RAW File (Click on Box button)
7. Choose wipe data
8. Connect Zenfone 2 to Laptop/PC
9. Your device will be appear on device list
10. Click Start Button
11. Wait until Finish
12. Download ADB tool and install it (Download)
13. Reboot your Zenfone 2 to Bootloader again
14. Place recovery.img, boot.img and droidboot.img to a folder
15. Open the folder and press shift+right click > open command here
16. Connect your Zenfone 2 to PC/Laptop
17. Type on CMD (press enter after each line):
fastboot flash fastboot droidboot.img
fastboot flash recovery recovery.img
fastboot flash boot boot.img
18. Download Asus Zenfone 2 Ze551ml firmware (Download)
19. Enter recovery (Tutorial Here)
20. Select Apply update from adb
21. Open Ze551ml firmware folder and press shift+right click > open command here
22. Connect your Zenfone 2 to PC/Laptop
23. Type on CMD (press enter after each line):
adb sideload UL-Z00A-WW-2.20.40.97-user.zip
24. Done

ASUS ZenFone 3, Fingerprint and Snapdragon Processor ?

ASUS ZenFone 2 Special Edition

According to Digitimes, for the first time ASUSTek will adopt fingerprint recognition technology for its third-generation ZenFone series smartphones. ASUS ZenFone 3 planned to be launch at May - June 2016.

Taiwan-based Elan Microelectronics and China-based Goodix will develop ZenFone 3 fingerprint recognition the sources said.

In terms of application processors, Intel and Qualcomm platforms together have so far accounted for about 80% of ZenFone smartphones and MediaTek's for about 20%

Fingerprint recognition technology was originally adopted for high-end smartphone models, the sources said. As Goodix, Elan, and other Taiwan-based IC design houes, such as Egis Technology and FocalTech Systems, have stepped up development of fingerprint recognition sensors, prices for such ICs have been dropping, and may fall to US$5 per IC in 2016, the sources indicated.

ZenFone smartphones have been selling well in the Southeast Asia, India, Brazil, Russia and Taiwan markets, and Asustek will also gear up for markets in Myanmar, Cambodia, Bangladesh, Egypt and Nigeria in 2016

[Full Firmware] Zenfone 2 ZE551ML V2.20.40.150

 

How to OTA update ? (Go to settings>About>System Update>Check for Update)
How to update Manual ? Place to Internal Storage>Restart>Click Update
How to update via ADB sideload ? Here 

Download only FOTA Files Here
 

ZENFONE 2 ZE551ML Z00A firmware: 
CN VERSION
Version V2.20.40.150  (CN) 
 

Description

Release Note ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.20.40.150 for CN SKU only* Improvement Item: 1.Several Apps update 2.Fix icon display issue in Settings 3.Improve the stability of Snap View 4.Improve the stability of Lockscreen 5.Improve the stability of Camera  6.Fixed WiFi Hotspot issue 7.Fixed Data transmission issue 8.Fixed Bluetooth transmission issue 9.Fixed SD card related issue 10.Extend the shutdown mimunes by power key press. 11.Improve the compatibility of apps For more information please refer to: TW：http://www.asus.com/zentalk/tw/ReleaseNotes WW：http://www.asus.com/zentalk/ReleaseNotes CN：http://zentalk.asus.com.cn/ReleaseNotes Steps of Update: 1. Check software version of your device** 2. Download device software and Update SOP (From “Manual” Item) 3. Only apply to same SKU update, Example: WW->WW, CN->CN, . 4. Software update cannot transfer the software SKU and downgrade the software version. 5. Wrong SKU may cause update failure, please update the same SKU version only. *How to know the device model? Path: Settings->About-> Model number Example: ASUS_T00I **How to know the device software version? Path: Settings->About-> software information->Build number ***System upgrade may cause part of data missing, please buckup your important data before system upgrading.

File Size	1.03GB                                                                             2015.12.17 update
Download from	Global

WW/TW soon