Not only is OsmocomBB incomplete, but it's illegal to use. I've heard it mentioned multiple times that the baseband and the full stack that communicates with the modem has to be verified by the FCC, in order to comply with regulation on RF bandwidth and power. Even if you got it working in your new cell phone, using it would be illegal. I'm not how true that actually is when you can flash router firmware to use illegal wifi channels, though.
http://bb.osmocom.org/trac/wiki/LegalAspects#Usingmodifiedph...