If you have a Mot C139/140 phone with one of the newer firmware versions in which the boot code expects the signature bytes in the serially downloaded code images to be "1004" or greater, rather than "1003" or greater as the more common and familar C139/140 boot code versions expect, you would like to use FreeCalypso loadtools with this phone, and you would like to keep using the current latest release fc-host-tools-r4, rather than compile from development source or wait for the next official release, then do as follows: 1. Download compalstage-1004.bin (it sits on the FTP site next to this README) and put it in your /usr/local/share/freecalypso directory. 2. Change -c 1003 to -c 1004 in the loadtools usage instructions you are following.