In the bottom-right corner of the screen, tap the Apps icon.
Swipe the Apps pages until you arrive at the page with the Settings icon. Tap on Settings.
In the Settings menu under the Wireless and networks/Connections area, tap Wi-Fi.
In the Wi-Fi menu, tap the three vertical circles or the MORE button in the top-right corner of the screen. A new menu should pop up on the screen. Scroll down this menu and tap Advanced.
In the Advanced menu, scroll down to the bottom (you may have click view more) and look for MAC address at the very bottom of the page. This combination of 12 letters and numbers make up your device's MAC address.