im working on the same thing right now.. the only thing i have found is that for metro u need one of their esn# to use the 6700 on metro.. its in a fine line of legal and illegal because u have to change the esn of the 6700 to the esn of the original metro pcs phone.. once the esn change is done only 1 phone should be used. both are to be powered down then turn on the 6700 and you should be good.
check out this
site.
http://www.mobile-files.com/forum/sh...ad.php?t=34392
i still haven't completed it yet but its in process. its not illegal to my knowledge as long as the origional esn is yours and not someones you are trying to clone..