Hello. I want the same, how the question from Option not to remember pin after the factory reset? for higher security. In my case for an TRB500 modem. Is a Custom script*, an solution? But exist a event in the case of Factory reset is starting? And then what is the command to set SIM PIN on zero or none?
I recommend updating your TRB500 to the newest firmware version, TRB500_R_00.07.07.1. This update allows you to choose whether to reset the router with PIN and some other settings saved, or to fully reset it to defaults when completing a factory reset.