ROM download linkhttp://www.needrom.com/download/cubot-c11/

Version: ROM Android 4.2.2
ONLY MT6572
Official ROM Cubot C11 Version: Q071E_V21_20B_JINGFENG_C11_6627_V203
Language support: Multilang

Tutorial

Unpack FlashTools, and Click on Flash_tool.exe
Select a the MT6572_Android_scatter.txt in ROM
Wait file to be added into Flash Tool>choose Option->USB Model,click USB Model>Choose Option>DA DownLoad All>Speed>High Speed,click High Speed
Turn off your phone, remove the battery>Press F9 (hit Download button) OR if upgrade ROM Firmware>Upgrade and connect your phone into the computer via USB data cable
The process will start and a red progress bar will appear after color purple,yellow
And green circles display
Finish !
You can now safely disconnect your phone and turn it on