Samsung SPH-M620ZKASPR - Manual (Page 129)

Section 2B: Controlling Your Phone’s Settings 103
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Updating Phone Software
The update phone software option allows you to download
and update the software in your phone automatically. Only
the internal software is updated; no contact entries or other
information saved to your phone will be deleted.
To update your phone:
ᮣ
Select Menu > Settings > Others > Update Phone SW.
Follow the onscreen instructions.