You can download Huawei G750-T01 official stock firmware (OTA update) from the link in this post, and follow the provided flashing instructions to learn how to flash the stock ROM.
If you notice that any of the links provided below is broken or doesn’t work, please post in comments section so we fix and update it ASAP.
Download Options
File Name: 荣耀3X真八核畅玩版（G750-T01，Android 4.2，Emotion UI，V100R001CHNC00B108，电商渠道).zip
Size: 707 MB
Build: V100R001CHNC00B108
Firmware – Download
How to flash
Once you have downloaded the firmware from above link, click here to learn how to flash.