Here the adb fastboot tool to flash your zenfone 5 ^_^ and the thing u need to flash your phone ^_^
… Firmware Asus Zenfone 5 (A500CG/T00F) terbaru support theme.
… How do you update Zenfone 5 T00j to lollipop?

Download Firmware RAW ASUS Zenfone Download RAW Firmware ASUS
Zenfone Download … Stock ROM, you can get its files in Stock ROM Asus
Zenfone (Any Model). ….. Download ASUS FlashTool for Asus Zenfone 5
A500CG / A501CG