Mac OS X

1. Open System Preferences (should be located in the dock)
   
2. Select the Network service
3. Left column, select Ethernet (this is your wired connection)
   
4. Click the Advanced button located near the bottom
5. Select the Hardware tab
6. MAC address is presented (e.g. 40:6c:8f:50:b5:76)
   

...

• Tap on Settings
• Tap on General
• Navigate to and tap on “About”
• Scroll down to “Wi-Fi Address. 
• The characters next to Wi-Fi Address is your device's  MAC address

Android Devices

...

1. On the Home screen, tap the Menu button and go to Settings.
2. Tap About Phone.
3. Tap Hardware information.
4. Scroll down to see your WiFi MAC address

Blackberry Smartphone

BlackBerry Device Software 4.5 to 5.0:

1. From the home screen, click Options > Status.
2. The WLAN MAC field displays the MAC address for the smartphone.
    

BlackBerry 6 to 7.1:

1. From the home screen, select Setup > Options > Device > Device and Status Information.
2. The WLAN MAC field displays the MAC address for the smartphone. 
    

BlackBerry 10 OS:

1. From the home screen select Settings > Network Connections > Wi-Fi > Advanced.
2. In the Diagnostic Information drop-down, select  Device Information.
3. The Physical Address field displays the MAC address for the smartphone.