Communication 3-19
6. Remove the brass thumb nut securing the dome to the monitor
top.
Removing nut securing regulator dome to monitor top
7. Carefully lift off the dome from the top (as if opening like a
book).
8. The SIM card holder in the enclosure functions based on spring
action. Therefore, press the exposed edge of the SIM card into
the holder and release. The card should pop out slightly, freed
from its secured position.
9. Slide the SIM card completely out of the holder.
10. Insert the new SIM card into the groove in the holder on the
inside of the enclosure, notched edge first with the contacts