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I had the same problem in my Samsung galaxy S5 (Marshmallow) where the encryption would not happen and the phone would just reboot. I turned off wifi, data and killed all apps. -> Faced same problem I removed my SIM card and micro SD card -> Successfully encrypted !!


I know I am late to this discussion, but, for others out there that may have not gotten an answer to this yet, device encryption on some devices may only work with a strong password. A (medium security) PIN may not be enough.


80% // Minimum battery charge level (in percent) to launch encryption. If the battery charge is // lower than this, encryption should not be activated. private static final int MIN_BATTERY_LEVEL = 80; Source:


As of today (May 30, 2016), the F2FS file system doesn't support shrinking. If it does by the time someone reads this, just let me know in the comments. The solution is then to delete and re-create the entire filesystem for /data. From this related answer on Unix & Linux Stack Exchange: mkfs.f2fs /dev/block/mmcblk0p36 11583168 This will do the trick. ...

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