Аналогичная проблема
[....] Starting update local time using GSM modem integrated RTC: wb-gsm-rtcWAR!
Try to switch off GSM modem
Send power down command
physically switching off GSM modem using POWER FET
Try to switch off GSM modem
Send power down command
physically switching off GSM modem using POWER FET
switching on GSM modem using POWER FET
toggle GSM modem state using PWRKEY
WARNING: modem restarted, still no answer (1/10)
Failed
ERROR while getting time
Thu Jan 1 20:00:00 UTC 1970