The Samsung Galaxy S5 is reportedly set to get the latest Android 4.4.2 KitKat by the end of this month, while the Galaxy S4 is set to follow next month.

Samsung's current flagship smartphone, the Galaxy S5, made its debut with Android 4.4.2 KitKat on board, but it now seems set to get an update to the very latest version of the software.

Android 4.4.3 KitKat has so far rolled out to Google Nexus devices, then to Google Play Edition handsets, and then to the Motorola Moto E, Moto G, and Moto X. It now seems that the new software is ready to start rolling out to other devices soon, with the Samsung Galaxy S5 seemingly the next in line.

In addition to the current Galaxy flagship, last year's Samsung Galaxy S4 is also expected to receive the new Android 4.4.3 KitKat by the end of July. More specifically, the new firmware will hit the unlocked, international, LTE-enabled version of the Galaxy S4.

The information comes from Android Geeks, which managed to obtain an internal Samsung document listing the devices set to get Android 4.4.3 KitKat.

"According to a document we received in our mailbox from an anonymous tipster, the Samsung Galaxy S5 Android 4.4.3 update will be rolled out for both the Exynos and Snapdragon variants of the smartphone later this month," Android Geeks reports. "The two new firmwares for Galaxy S5 SM-G900F and SM-G900H are labeled G900FXXUOBNE6 and G900HXXUOBNE3, respectively."

The publication further notes that both of these devices have completed the testing phase, which means that they may receive the latest firmware sooner than expected, perhaps even in the next few days.

The Samsung Galaxy S4 with model number GT-I9506, meanwhile, is reportedly in the final testing stages, expected to be the next in line to receive the new Android 4.4.3 KitKat. This model, however, will not get the new firmware until next month, so Galaxy S4 owners still have a bit of a wait ahead of them.

As expected, Android 4.4.3 is not a major update, but it does bring some neat bug fixes and enhancements. Bigger changes, meanwhile, are expected to come with the next version of Google's popular mobile operating system. The company will likely launch Android 5.0 at its Google I/O 2014 conference later this month, on June 25 - 26. In the meantime, Android 4.4.3 is the latest version of the OS, and it's coming soon to the Samsung Galaxy S5 and Galaxy S4.