thank you reply. osmocomBB devided into two separate applications: 1,running on the baseband chip of the phone 2,running on a PC, communicating with the baseband firmware over serial i mean is possible use n900 instead of PC host ,connect "compatible phone" (@@MotorolaC115@@) to N900 via H-E-N hostmode,MotorolaC115. MotorolaC115 run osmocomBB baseband firmware ,and N900 run Firmware management and GSM Layer 2/3 application sorry ,my bad english .. http://bb.osmocom.org/trac/wiki/Applications