I found this on google.
Turn off Wi-Fi power by touching Apps > Settings > Under Wireless & networks turn Wi-Fi Off.
From the home screen, touch Apps > Settings > Tethering & Mobile Hotspot > Mobile Hotspot to turn on the hotspot.
Touch Mobile Hotspot settings > Configure Mobile Hotspot to change hotspot security and configuration settings:
• Network SSID—Enter a unique name for your hotspot
• Security—Select the type of security you want, and touch Save: WEP, WPA, or WPA2. Enter a unique password. Other users can access your Wi-Fi hotspot only if they enter the correct password.
Note: Keep it secure. To protect your phone and hotspot from unauthorized access, it is strongly recommended that you set up hotspot Security (WPA2 is the most secure), including password.
• Broadcast Channel—Select a channel that minimizes potential interference. You may need to try different channels after your hotspot is active for a time.
Touch Save when the settings are complete. When your Wi-Fi hotspot is active, other Wi-Fi enabled devices can connect by entering your hotspot’s SSID, selecting a Security type, and entering the correct Wireless password.