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The update should be offered to your device automatically OTA, but you can also initiate it manually. A detailed list of the update's offering follows :
source - Asus
New Feature:
- Supernote
IME/Translation:
- Added Farsi IME support
- Czech IME improvement : support Qwerty & Qwertz
- JP SKU fixed translation bug and Polaris office font
- Added more language translation into ASUS App
APP Updates:
- CN SKU 3rd party app bug fix
- Polaris office & ASUS WebStorage update
Improvements:
- Browser with Adobe Flash improvement; ex: YouTube
- Browser force-close improvement
- Improve Wi-Fi stability
- Improve Chinese handwriting prediction : recognize character from each stroke
source - Asus