Page 132 of 237
Version: 5.1.6 – June 4
th
, 2019
In addition, routers with a GSM/UMTS module and double SIM slot can switch between SIM1 and SIM2.
First, we need to specify a primary SIM card, which will always be verified or used by default. The secondary SIM card
is always the non-primary one.
Switching is based on two (selectable) criteria:
The SIM card fails to initialize, or to register on the mobile broadband network
Roaming is detected on the SIM
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