usage_iface.RequestResource("GSM")
gsm_device_obj = bus.get_object("org.freesmartphone.ogsmd", "/org/freesmartphone/GSM/Device")
usage_iface.RequestResource("GSM")
gsm_device_obj = bus.get_object("org.freesmartphone.ogsmd", "/org/freesmartphone/GSM/Device")