So the question posed by @nab2385 a couple of posts back is a good segue into what is currently happening in the world of ROM development for AOSP based ROM's. The new trend is to have unified builds, which are able to be flashed for all U.S. carriers, instead of a build for Sprint, a build for T Mobile, a build for AT&T, etc., etc. This is good news from the standpoint of ROM devs being able to focus on what goes into each ROM, as opposed to tweaking various aspects of the same ROM in order to make it work for each specific carrier. However, for the bastard children of Virgin Mobile and Boost Mobile, whose devices are known as d2vmu, there continues to be little or no love. These new ROM builds, known as d2lte for the Samsung Galaxy S3, still contain an assert which does a compatible device check, I assume to prevent an international S3 from flashing one for the U.S. carriers. This device check does not contain d2vmu as an allowed device, so it will still be necessary to remove or edit this line in order to flash. Perhaps it is time (or really past time) to make our voices heard as well-contact the dev of your favorite ROM and let them know of our specific situation. If enough of us pipe up, hopefully they will add that one little extra bit to the assert line in the current updater-script. As always, be polite and appreciative of their hard work, don't demand anything-while it is a slight pain in the butt to have to do what we do in order to make custom ROM's flash properly, it is a rather minor thing in the grand scheme, but it would be nice to be included in the recognized SGS3 family. And also as always, happy flashing!