Sony says there are “many improvements” in the upgrade, with better battery performance in background applications and improved email stability & performance singled out for particular note. The company recently unveiled the newest incarnations in the line, the Z3 and Z3 Compact.
The Android 4.4.4 update will bring international Wi-Fi calling, version 2.0 of KNOX, and the Kids Mode feature that debuted on the Galaxy S5, along with bug fixes and security patches from Google.
Samsung of course recently launched the Quad HD Galaxy Note 4.
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