Download latest Android Jelly Bean 4.2.2 stock firmware for Cubot C9+ smartphone from here or from here.
Archive： Cubot C9+ fw
Firmware image file: MT6572_GG406TM_C9+_V01.07_20131219
Model： Cubot C9+ smartphone
Image file size: 361 MB
Platform: Mediatek MT657
Caution: Please do not update firmware unless you know what you are doing, you really want it or it is absolutely necessary. Firmware updates may occasionally have bad results, like bricking your device, temporarily or permanently. The firmware update process is done entirely at your own risk. Before attempting to update the firmware, back up your data.