The South Korean manufacturer, Samsung is reportedly preparing latest Android's version 4.4.3 KitKat update for their 2014 and 2013 flagship handsets. According to the reads of coming in from androidgeeks, Samsung has scheduled OTA updates to Exynos (SM-G900H) and Qualcomm (SM-G900F) versions of Galaxy S5 smartphones, later this month and for Galaxy S4 handsets the next month, July. The new firmware for the Galaxy S5 models will be dubbed as G900HXXUOBNE3 and G900FXXUOBNE6, respectively, and for Galaxy S4 it will be I9506XXUQDNE4.
The above filing also hits us that the operating system Android 4.4.3 build for the model GT-I8506, which is the LTE-A version of Galaxy S4 is in it's final stage of testing.
Source: androidgeeks