The functionality of the button is explained in the section about the Reset button
Behind the top back panel there is a socket for insertion of a SIM card.
Please also refer to the section about the SIM Card Interface for more details.
Bottom Back Panel
The bottom back panel covers the back expansion slot and has to be removed when
installing a Secondary Expansion Card.
Option provides a custom panel for the following secondary expansion cards:
WLAN Expansion Card
WLAN Access Point Card
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