I strongly recommend to just note down your MAC address before starting to experiment on it. If your Android device is rooted, you can easily change the MAC address of the device but what if it is not? For changing the MAC address permanently, you will have to root your device. There any many instances where someone has blocked your device from connecting to their router, what should you do in that case? Changing the MAC address of your device would definitely work in this case. If you are surfing the web from your Android phone using a WiFi network, the network adapter of your WiFi devices must have a MAC address to set up the connection and transfer data over the network.
This identifier helps to distinguish a specific device over the cluster of devices connected to a particular network. It comes already hard-coded on your mobile system. Media Access Control is a unique ID consisting of 12 digit hexadecimal numbers.
