@peterleinchen

Actually none of the SIMs have PIN code enable so that's the explanation.

On the other hand, it seems none of the methods are working after all. Nor my above attempts, nor calling 'sim-switcher SIM1 and 2' in the script. It is strange why first attempt of running the script succeeded (when using sim-switcher) and second attempt fail with SIM2 remaining active and when I am trying a normal call with SIM2 I get call not allowed (although your script display wrongly the message of successfully switch). This means also that switching back to SIM1 is not possible without using killall csd or reboot. Maybe the sync is causing this strange behavior, otherwise I see no logical explanation for this.

The next method I will try is to separate totally the actions of switch SIM and sync, i.e. to switch first the SIM 3 minutes before the sync with Alarmed, do the sync and switch back 3 minutes after the sync with Alarmed as totally independent actions.

Regarding your note, I cannot dial 002 in offline mode to switch SIM.