If you are planning on turning the phone in for a warranty issue, the simplest way to get back to a factory state is just to install the
Leak-V3 ROM
Note that this will: a) Wipe your phone settings, and b) Install the bad-news bootloader 1.49.0000 S-ON.
Note that an extremely savvy VZW Rep might take notice of a 1.49.0000 S-ON bootloader, if you are returning a phone that is several months old: even though it is not the "root" bootloader, there is no way that you would have that bootloader on the phone via
any of VZW's official software update methods - at most you would have 1.47.0000. That's because only recently has VZW started handing out phones configured with that bootloader - and those might all be refurbs. Just sayin'.
There is a more complicated procedure in
the sticky post at the top of this forum, on the very first page.
Look for the hard-to-find section entitled
Full Downgrade from 2.1root (any) to 1.5 stock - FULLY WORKING
eu1