echo 0 > /sys/devices/platform/neo1973-pm-gsm.0/power_on
echo 1 > /sys/devices/platform/neo1973-pm-gsm.0/power_on
socat - file:/dev/ttySAC0,crtscts,crnl,b115200

ATE1
AT+CFUN=1
# AT+CPIN="0000" # your real PIN here of course!
AT+CPIN?
AT+COPS
AT+COPS?

 AT+COPS=0,0
 AT+CNMI=2,1,2,1,1
 AT%CBHZ=1
 AT+CSQ
 AT+CREG?;+COPS?
 AT+CPBS="SM";+CPBR=?
 AT+CMGL="ALL"
 AT+CPBS="SM";+CPBR=1,250

alsactl restore -f /usr/share/openmoko/scenarios/gsmhandset.state
ATD
ATH