Need to completely erase data on Samsung SCH-u340 (CDMA on Verizon)

Hi there,

I have a Samsung SCH-u340 (CDMA/Verizon) that I need to completely erase.

The only option I have found is located under:
Menu -> Settings -> Phone Settings -> Security -> (code) -> Reset Phone

However, this just resets the settings.

I need to erase all data. If possible, is there a master reset or master erase? The main thing I want to remove is my phone number that is still in the "phone info" section.

Thanks.