I'm pretty sure that your SIM is recognized.

Provided the notifications you got are keyboard slider movement notifications, then there might be a little misunderstanding of functionality. Because SMSCON behaves as expected:

If keyboard slider detection is enabled then this event is reported. No further conditions apply. This does not mean that your phone thinks you are a thief. Same is true for battery status, command acknowledge notifications, etc.

Indeed the option-title "Slider Open" is not quite correct. In fact it is "Slider Movement" e.g. a notification is send on open as well as on close. For now we should fix the title.

We already discussed that this kind of keyboard usage reports are not very usable and we probably make some improvements in one of the next versions.