Good news CAESAR has released the firmware for CAESAR H7500+
Download link: CAESAR H7500+ Firmware
Flash tool: http://www.mediafire.com/download/slxszvc8vastetc/SP_Flash_Tool_v3.1312.0.139.rar
Note: pls install the drivers if it is the first time flash your phone on the PC.
1. Choose the file “MT6589_Android_scatter_emmc.txt” as below method:
2. click up upgrade and contact your phone with pc. It will flash auto. after 100% and a green small window appears, everything will be ok.