As seen in the download options below, we have made available two different official firmware packages for the ZTE Grand X2 device.
One is carrier-specific, while the other is universal for all ZTE Grand X2 smartphones. They are both official stock ROMs update, and can only be flashed via SDcard.
Downloads:
File Name: 2013122510471057.zip
Size: 374 MB
Firmware Link – Download
File Name: 2014011316311217.zip
Size: 375 MB
Firmware Link – Download
How to flash Grand X2 Firmware
After downloading the firmware package that best suits your device variant/carrier, click here to follow flashing instructions.