It looks like manufacturer’s are on the roll of either releasing phones with kitkat on-board or pushing out the updates for flagship devices as soon as possible. According to the latest leaked document, the Android 4.4.3 update for Samsung Galaxy S5 is slotted to be rolled out this month whereas the same could possibly be pushed for Samsung Galaxy S4 in the month of July. Recently, Google started pushing Android 4.4.3 update for nexus as well as play store devices. Immediately after the update was pushed, Motorola announced the update for Moto E, G and X which was quite surprising. Now looking at the end results, it seems that Samsung is in hurry to push out the update at least for its flagship devices.
An anonymous tipster send an email to android.gs editors with the document about the update timeline. According to this document, the Android 4.4.3 Kitkat update for Samsung Galaxy S5 would be rolled out to both Exynos as well as Snapdragon variants during the same time period. The firmware numbers for these two variants are reportedly labeled as G900FXXUOBNE6 and G900HXXUOBNE3. Additionally it appears that the testing phase of the Galaxy S5 update has been completed and therefore users might just receive it within next couple of weeks.
Android 4.4.3 Update for Samsung Galaxy S5 and S4
In the same document, it is also mentioned that the Android 4.4.3 update for Samsung Galaxy S4 is in the process of testing. It shall be released to the customers in the month of July. There are no details available regarding which variants of the Galaxy S4 would be receiving the update or what is the individual progress of testing out this update on these variants.
The Android 4.4.3 update for nexus devices bought various bug fixes and re-designed phone dialer app. While it is not expected to be changed in the Samsung branded android phones, you can just expect to see minor bug fixes and performance boost. As of now, there are no further details available regarding the update changelog.
There is no way this document could be verified and therefore I would recommend you to take this leak with a pinch of salt.