COMMELL LS-37B - Manual (Page 33)

LS-37B User’s Manual
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Step 4.
Insert a SIM card as shown in the photo.
Be sure that the corner cut is on top and the golden pads are up.
Step 5.
Now, flip down the cap as shown in the photo.
Step 6.
Press down and slide the cap to the CLOSE position.
Be sure that the cap is tightly held with the socket.