NR7101 - How to use the dual SIM Function?

How to use the Cellular Dual SIM function on the NR7101?

Introduction
This document explains how to configure the NR7101 Cellular Dual SIM function and is based on the firmware V1.00(ABUV.6)b4.
NR7101 has two SIM slots that can insert 2 SIM cards, but not two SIM cards function simultaneously.

The cellular Dual-SIM function is a failover design; it allows to switch off the SIM card automatically.
SIM slots.

Steps
1. NR7101 has two SIM slots; refer to SIM 1 and SIM 2 when you choose the Cellular Dual-SIM function.

First, insert two SIM cards.

2. Log in to NR7101’s web GUI.
3. Go to the Cellular Dual SIM function (Network -> Broadband -> Cellular Dual SIM).

The default setting of “Preferred SIM slot” is “Auto.”

Scroll down the menu, and there are more options:

• Auto
• SIM1
• SIM2

“Auto” means NR7101will choose SIM card automatically.
“SIM1” and “SIM2” means NR7101 will choose the SIM card in the specified slot.
“Switch when Detach” function means switch to another SIM slot when the current SIM cannot attach successfully.
4. Choose “Preferred SIM Slot” to “Auto” and enable the “Switch when Detach” function.

Verification
We use two SIM cards to verify the function.

One SIM card can connect to the mobile network (we will use “able SIM card” to describe it), and another cannot connect to the mobile web because the contract is over. 

(we will use “unable SIM card” to describe it)

Customers can check which SIM card is used through System Monitor -> Cellular WAN status.

Check the IMSI and ICCID to identify which SIM card is in use.

For example, IMSI 466011700423XXX is a SIM card that can connect to the internet.

Setting

When we enable the “Switch when Detach” function and set the “Preferred SIM Slot” to “Auto,” It will automatically switch from “unable SIM card” to the “able SIM card,” and the connection status will change from disconnected to connected.