It is proper Netiquette to get to know your device. Do know the features if you use it a lot.
Mobile Devices are designed to be used by people moving around. The more time a user spends moving around using their mobile device the more they will benefit from mastering its use. It will decrease the time it takes to perform functions.
Mastering your mobile device allows you to focus on the environment as well as enjoying the device. It is less things to think about when using your mobile. More time to concentrate.
Know the features of devices and apps used regularly because it saves time.