Then, go to the Wireless menu, located on the bottom left side.
When you will click on the Wireless menu, a new menu will appear on the right side.
The first option on the right side will be Airplane mode.
There will be a sliding switch which is by default on the off position.
You can slide the slider to turn on the Airplane mode and disable all the wireless connections.
I wonder why they add the airplane mode. On the same screen, you could just turn off the wi-fi and it will do exactly the same thing. Is MS thinking to have phone option in the future?