How to test a WR31 router step by step.
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5.2 Test SIM 1
Ensure that an antenna (or both if using an LTE unit) is connected and the router is located in an area
with good signal strength.
Navigate to:
Configuration - Network > Interfaces > Advanced > PPP 1 > Mobile
Change W-WAN SIM: from “Any” to “SIM 1”
Click Apply.
Next navigate to
Configuration - Network > Interfaces > Mobile
And select SIM 1
Under “Mobile Settings”
Enter the correct APN for the SIM card installed in slot 1
Click Apply.