Latest V551 firmware as of this writing.

Available at:
<http://www.motox.info/showthread.php?t=2021>
<http://www.motomodders.net/default.aspx?tabid=119>

Successfully flashed R472_G_08.18.55R firmware (only) into my Cingular
branded Motorola V551, replacing firmware R472_G_08.18.40R.

Menus now seem a bit faster, and reception seems a bit better.

Recommended.

--
Best regards, FAQ FOR CINGULAR WIRELESS:
John Navas <http://en.wikibooks.org/wiki/Cingular_Wireless_FAQ>