If you have the above device which is a clone of the HTC One, you can download the stock firmware for the MT6580 version.
Other CMX ONE ME MTK devices running on Android 4.4.2 using the older MT6572 chip also have their firmware online.
The firmware on this page shouldn’t be confused with the MT6572 firmware above. The ROM shared here is stock and runs on Android 5.1 Lollipop.
Flashing this firmware on any other Android phone other than the one it was meant for(MT6580), will surely brick your device.
The firmware shared here is a Miracle box dump which can be easily flashed via Miracle box software or any other compatible software.
To download the firmware, click on the download link below.
CMX ONE ME MT6580 Stock ROM – Download
Miracle Box v2.27 – Download
If you have any issue, please leave a comment.