I use a mobile configuration but it seems not working. the mobile.cfg shown below ! ! OsmocomBB example configuration for mobile application !! ! line vty no login ! gps device /dev/ttyACM0 gps baudrate default no gps enable ! no hide-default ! ms 1 layer2-socket /tmp/osmocom_l2 sap-socket /tmp/osmocom_sap stick 1 sim none network-selection-mode auto imei 000000000000000 0 imei-fixed no emergency-imsi no sms-service-center no call-waiting no auto-answer no force-rekey no clip no clir tx-power auto no simulated-delay location-updating neighbour-measurement codec full-speed prefer codec half-speed no abbrev support sms a5/1 a5/2 p-gsm e-gsm r-gsm gsm-850 dcs no pcs class-900 4 class-850 4 class-dcs 1 class-pcs 1 channel-capability sdcch+tchf+tchh full-speech-v1 full-speech-v2 half-speech-v1 min-rxlev -110 dsc-max 90 no skip-max-per-band test-sim imsi 001010402698197 ki comp128 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 no barred-access rplmn 001 01 ! io-format ti no shutdown can you give me a config that working. thank you