Being that ZTE Builds(B09 or B12..ect.) are not relevant how would I go about trying different ROMS that say they are made for a B12 Build or what not? I have been looking to try the LOS 15 build, but would also like to try Nfounds Havoc or AEX. His says its for build B12. Is it possible to do these types on mine? I'm cautious and don't want to end up with no working phone. Thanks again for all support.
The other ROMs might be built *from* particular ZTE builds, but are not "for" them. They don't run on the ZTE version of Android itself which may currently be on your phone, they *replace* it.
There would be other bits and pieces included in/with the official ZTE builds, however, which those other ROMs don't replace. The most important one I can think of is the radio / baseband module - as a general rule I'd be inclined to update (if necessary) to the latest ZTE build for your country, before changing from a ZTE build to another ROM.