Samsung SGH-T989AABTMB - Manual (Page 235)

Changing Your Settings 230
Software Update
The Software Update feature enables you to use your phone to
connect to the network and upload any new phone software
directly to your phone. The phone automatically updates with the
latest available software when you access this option.
ᮣ Press ➔ and then tap (Settings) ➔
Software update.
The phone automatically updates the software (if
available).