Samsung SGH-T959V User Manual page 180

To secure the Mobile AP service:
The two most common methods for securing your connection to
the Hotspot are to a security method (WPA2 PSK) and to Hide
your phone's SSID name.
Press
1.
Wireless and network
Mobile AP settings
Tap the Security field and select WPA2 PSK.
2.
With security enabled, enter a new password into the
3.
Password field.
Important!: The more complex the password, the harder it will be for
intruders to break your security. It is recommended that you not
use names, birthdays, or
Tap the Hide my device field to keep your phone from
4.
transmitting its Network SSID name.
Tap Save to store the new settings.
5.
175
and then tap (Settings)
Tethering and portable hotspot
Configure mobile AP.