How-To: Enable Mobile Hotspot on Your Nokia Lumia 900.

1. Swipe the Start screen to the left.
2. Scroll down and press "Settings".
3. Select "Internet Sharing".
4. Tap the "Sharing" slider in order to enable internet sharing.
5. Press the "Setup" button.
6. Enter the broadcast name in the first field.
7. Select the security type from the second field.
8. Type in the Mobile Hotspot password in the appropriate field and press "Accept".

How-To: Enable Wi-Fi Connectivity on Your Nokia Lumia 900.

1. Swipe the Start screen to the left.
2. Select "Settings".
3. Tap the "Wi-Fi" option.
4. Toggle Wi-Fi connectivity On by sliding the "Wi-Fi network" slider.
5. Tap the Wi-Fi network you wish to join.
6. Type in the network password if prompted to do so.
7. Press "Done".

How-To: Enable Bluetooth and Connect a Bluetooth Device on Your Nokia Lumia 900

1. Swipe the Start screen to the left and tap "Settings".
2. Select "Bluetooth".
3. Tap the slider to enable Bluetooth connectivity.
4. Select the device you wish to pair your Nokia Lumia 900 with.