The S4's spring-loaded microSIM slot is a pleasure to use.
It also features a microSD slot to expand its memory up to an extra 64 GB.
On turning it on, we were met with Samsung's highly customised Android Jelly Bean interface.
If you're used to the stock Android interface, you'll waste some time in figuring out the options. Good for Samsung veterans, not so for the rest.
Shortcuts for all commonly used settings were available on a single screen with just one tap.