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May I know how to downgrade from android 4.4.2 kitkat to jelly bean? There are many problems on my galaxy note 10.1 after upgraded to kitkat. Please help me~ Thank you very much!

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If you took a backup of your ROM before updating, then you can restore the backup. Alternatively, if your phone is rooted then you can download a stock Jelly Bean ROM from somewhere like XDA and flash it.

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Tread carefully here. If your Galaxy Note 10.1 has the Knox bootloader (the 2014 edition does), then you won't be able to downgrade the OS even if you have a Nandroid backup or the original Jellybean firmware. Knox prevents downgrades and you'll likely soft brick your device. I did this accidentally on by Galaxy S4 by applying an older firmware backup (only a minor patch release) instead of the most current one.

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