Primary SIM Slot
Slot B is the primary SIM card slot for Airstream Connected and Smart Control systems.
If you have a SIM card placed in slot A, the router may not operate as intended.
Multiple Cellular Carrier SIM Cards
If you have two SIM cards installed (Slot A and Slot B) operating off of different cellular data networks, Slot B will be your primary source of data until it would lose signal. At that point, the router will automatically transition to Slot A as a cellular provider.
Can I manually switch SIM slots to have manual control over which carrier is selected?
No — the user is unable to manually switch between Slot A and Slot B.