Samsung SCH-I830MSASPR - Manual (Page 192)

184 Section 3A: Sprint PCS Service Features: The Basics
Continue Recording
When leaving a voice message, you can choose to continue
recording even after you’ve stopped.
ᮣ
Before pressing to indicate that you are satisfied
with the message you recorded, press to continue
recording.
Extended Absence Greeting
When your phone is turned off or you are off the Nationwide
Sprint PCS Network for an extended period, this greeting can
be played instead of your normal personal greeting.
1. From the main voicemail menu, press for Personal
Options.
2. Press for greetings.
3. Press to record an Extended Absence Greeting.