Can I delete my number from my Samsung SCH-A870 with BitPim?

[Relztrah]

Before I sell my old Samsung SCH-A870 I would like to delete my number. I did a reset but my number still shows up when I go to Menu>Settings & Tools>Phone Info>My Number. I was also able to access both the SYSINFO editor and USERPREFS editor, changed my number to 0000000000 wherever I saw it, but it still shows up when I go to Menu>Settings & Tools>Phone Info>My Number. I also did a User Data Reset under that same PARAM editor to no avail.

BitPim detects the phone and I can look at the NVM files, but I don't see a way to edit those files and write back to the phone. Any ideas?