Earlier attempts on older ROS to put in an invalid PIN did nothing more that one attempt to set it and fail with a notice into the log, but the v6.15 with LTE moodule it kept on trying that invalid PIN and after 3rd one the SIM was locked - go and find a PUK and a phone.
I seek the restoration of the previous functionality. If the PIN is wrong at the first try, there is no need to commence it numerous times.
Btw: How to enter a PUK code under the ROS?