MLis MLB-G420 Series, User Manual

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3.4 Hardware Installation
In the bottom, the MLB-G420X wireless terminal is provided with a SIM card reader designed for 1.8V and
3V SIM cards. It is the flip-up type which can be locked. It can be accessed through removing the cover as
shown below.
Figure 8: SIM Card Holder for MLB-G420X
➢
Be sure to power off the modem when user replaces the SIM card. Otherwise it may cause
damage to the equipment.
The MLB-G420X fully operates when inserting a SIM card. Some MLB-G420X functionality may be lost if
user trys to operate the wireless terminal without a SIM card.
Installing a SIM Card
The SIM card slots are located inside the MLB-G420X ’s housing. To install a SIM card, please follow the
steps listed below:
1. Turn off the MLB-G420X.
2. Remove the screw to open the SIM card slot cover.
3. Install a SIM card into a SIM card flip-up holder.

For SIM 1, orient the gold contacts facing down and the cut-off edge to the left.

For SIM 2, orient the gold contacts facing up and the cut-off edge to the left.