Hello,
when BG770A goes to PSM, it reports URC +CEREG: 4. Common scenario is:
+QPSMTIMER: 90000,0
+CEREG: 4
PSM POWER DOWN
The documentation states that registration status is Unknown. Why is the module reporting it this way? If it goes into PSM the module stays registered and should still report values 1 or 5. IIRC BG95/BG77 weren’t reporting value 4 and stayed at 1 or 5.