Hi, here is the firmware of Cubot S200, this firmware has fixed the white screen issue when power on/off.
Before you do the flash step, please read the flash instruction carefully first.
Flash tool: Flash Tool for MTK6572-6582
Firmware: Cubot S200 MTK6582 Android 4.4 Smartphone Firmware
Passcode: geekbuying.com
Have a nice day!
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