Android 4.4 KitKat is on its way to launch soon but before that check the latest leaked screenshot that will give you many unknown information of upcoming OS. Google will definitely change a lot to make it more accessible to end user and it's expected to launch with upcoming Nexus 5 version in October.
According to screenshot, Interface gets lighter color and Messaging app is redesigned with new interface and completely changed in new version. Android 4.4 KitKat Phone dialer becomes smarter and call button now moves to center position for faster access though both hands.
We don't have many information about the upcoming Android version but from the leaked screenshot, we noticed many changes, so let's wait until the full information come out.
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Apple has modified iOS so much to increase performance of new iPhone devices and new tests revel that Apple new interface in new models are much faster than the Android latest version, so in spite of standing in No. 1 position, Android is going to have a tough competition against iOS.