This situation is caused by disruptive firmware.you can solve this problem by refurbishment.Download the following three files and follow the lesson.
http://milantrend.com/Cubot/C9/CUBOT_C9_upgrade.rar http://milantrend.com/Cubot/C7/Cubot_update_tool.rar http://milantrend.com/Cubot/C9/C9_upgrade%20instruction.docx
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