Samsung Galaxy S4 is the most powerful phone today you can buy with excellent hardware. Samsung Galaxy S4 runs on 4.2 jelly bean, but Samsung has customized it with there own software called Touchwiz.
This is why Samsung Galaxy is different than other android phones available in market. Samsung Galaxy S4 comes with lots of new features and apps.
You can try the following topics in simulator.
- Basic functions
- Customize screens
- Screen lock