How can I update to Android 4.4 manually? I have Samsung Galaxy Tab 2 10.1' with Android version 4.1.2. Is it possible to manually to update to Android 4.4, and if yes how?
It is not currently possible for non Nexus devices. For this you will have to wait until Samsung release a version of Android KitKat for your device or until a developer release a ROM based on Android 4.4 for your tablet (CyanogenMod for example).