... Therefore, even when the phone is not lost or stolen, I'd prefer SMSCON (optionally) to lock the phone after it has been booted up and SMSCON daemon has started. Is it possible?
... If the SIM card had been changed, then based on the user settings either lock, do not lock, or run some other blocking or non-blocking app.
... Also auto-locking after inactivity (1 - N min) should be inside smscon daemon, because the system setting for that cannot be used.