Samsung Galaxy S5 vs Galaxy S4: Do you need to upgrade?
We investigate whether the 2014 handset is a must-have

Operating system
The Galaxy branded smartphones are the most popular Android devices and always ship with the latest version of Google's OS. They also include Samsung's customised TouchWiz overlay.
To entice enterprise customers, Samsung has been rolling out its Secure Android dubbed Knox. This aims to allow IT admins to easily manage devices using third-party tools from companies like CA Technologies and Good Technology. Knox is also able to scan and validate apps from the Google Play Store, and supports secure boot, two-factor authentication and enterprise features like VPN+.
Galaxy S4 - Launched with Android 4.2.2. Samsung is in the process of rolling out the latest 4.4.2 KitKat upgrade. Knox is compatible with this device.
Galaxy S5 - Will ship with Android KitKat 4.4.2. TouchWiz has been scaled back and the icons have been redesigned. Knox 2.0 is loaded as standard.
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