Slide your finger down the display starting from the top edge of your mobile phone.
Press the settings icon.

Tap the Networks tab.

Tap Tethering & networks.

Tap Wi-Fi hotspot.

Tap Set up Wi-Fi hotspot.

Key in the required name for the Wi-Fi Hotspot.
Tap the drop down list below "Security".

If you don't want to password protect your Hotspot:
Tap Open.

If you want to password protect your Hotspot:
Tap WPA2 PSK.

Tap the field below "Password" and key in the required password.

Tap Save.

Tap the indicator next to "Wi-Fi hotspot" until the function is turned on.

Do the following on the device which is to connect to your Wi-Fi Hotspot:
Turn on Wi-Fi.
Find the list of available Wi-Fi networks.
Select the network name you keyed in in step 2.
Key in the password you selected in step 2 and establish a connection to the Wi-Fi Hotspot.
When the connection is established, you can access the internet from the other device.

Tap the home icon to return to the home screen.