Unscrew the protective shield over the SIM slots using a Phillips-head screwdriver.
Ensure that the SIM card is in the correct orientation before inserting it. The notch side of the SIM card should be inserted first with the metal contacts facing the front of the device. Use the included SIM tool to insert a Nano 4FF SIM card into the appropriate SIM slot. Be careful to not use excessive force.
NOTE: This device supports only Nano SIM cards.
Reattach the protective shield cover to a torque of .3Nm (.221 ft/lb), making sure the tether passes through the hole of the rear housing and is not bent or bunched.
WARNING! If the tether is bunched, it could prevent the compartment from being effectively sealed.