OTA UPDATE PROCEDURE for ZenFone
Only apply to same SKU update, Ex: WW->WW, CN->CN, TW->TW.*
Software update cannot transfer the software SKU and downgrade the software version.
Wrong SKU may cause update failure, please update the same SKU version only.
1. Download OTA ZIP file from ASUS official Web Site. http://www.asus.com/support/
2. Connect the phone on PC by USB cable, please unzip file or you can check the file format should the
same like below and put the OTA zip file into your phone’s root directory of internal storage.