why i didn't get all the ios 9 features
i have a iphone 5s and 2 days ago i update my iphone to ios 9.0.2 and i search at youtube all features of ios 9 but when i check my phone i didn't find the features at all for example to change the mute button function to be a lock rotation, i didn't get all the wallpaper, and many more please help me to fix it.
iPhone 5s, iOS 9.0.2