Some AT commands we've found useful for debugging checking things.
AT+CMER=2,0,0,2,0
+CIEV: battchg,5 -- Battery charge level (0-5)
+CIEV: signal,7 -- Signal level (0-7)
+CIEV: service,1 -- Service is available (true/false)
+CIEV: sounder,0 -- When the phone is ringing (true/false)
+CIEV: message,0 -- If unread message (true/false)
+CIEV: call,0 -- If call is in progress (true/false)
+CIEV: roam,0 -- If we in roaming (true/false)
+CIEV: smsfull,0 -- If the memory is full of SMS (true/false)
+CIEV: rssi,3 -- Signal strengh (0-5)
AT^SCFG?
AT^SCFG=”Userware/Autostart/Delay”,”100”
AT^SCFG="Userware/Autostart/AppName","","a:/app/OwnTracks.jar"
AT^SCFG="Userware/Autostart","",1
AT^SJRA=a:/app/owntracks.jar
AT^SCFG="Userware/Watchdog","1"