I believe i have posted this info before but for the LAST time, i'm posting it again for those who are interested in getting a China set and would like to flash it with an international ROM with Google services. This is assuming u have got the 2Ghz, 2GB RAM and 16GB ROM model. If yours is the lower spec 1.6Ghz model, look for TOOJ_WW ROM file instead.
IMPORTANT: Perform a factory reset before flashing with an international ROM version. Documented steps available here (for ZF6 but it works for ZF5 as well): Asus Zenfone 6 double wipe tutorial ~ Asus Zenfone Blog News, Tips, Tutorial, Download and ROM In addition, make sure the battery is sufficiently charged (preferably not below 20%) before proceeding with the flash update.
1. Download the latest International firmware for TOOF_WW model. Firmware updates here:
Phone - ASUS ZenFone 5 - ASUS
2. Take note the date of existing firmware in the phone (Settings->About->Software Information). Eg: 20140430 for V0430 firmware.
3. Extract the ???-user.zip file from the downloaded ??? _user.zip file. (??? represents the firmware revision number/date)
4. Rename the ???-user.zip file to UL-ASUS_T00F-CN-yyyy.mm.dd.65432-user.zip where yyyy.mm.dd is any date newer than the existing firmware. '65432' is just an arbitrary number, u can use any 5-digit number as well.
5. Connect phone to PC. Copy the renamed UL-ASUS_TOOF-CN-yyyy.mm.dd.65432-user.zip file to the root directory of the phone's Internal Storage.
6. Disconnect phone from PC.
7. There's an exclamation mark notification on the notification panel. Pull down and click to update. During the update, u will see a progress bar. The progress bar is NOT linear, it will appear to be stuck at the 20% to 30% mark. Please be patient and
DO NOT INTERRUPT the process. Once its completed, the phone will reboot by itself and u will see the home screen.
8. Firmware update complete.
9. Once u have successfully flashed the phone with an International ROM version, all future ROM updates will be easy. Simply download the appropriate WW ROM file for your model and place it at the root directory of your INTERNAL STORAGE. The phone will automatically detect a new ROM update available and prompt u on the notification bar. Click on the notification to start the update process.