Dual sim router

Our 819 4G routers have dual sim cards, but the units don't seem to always failover to the 2nd sim once the data allowance on the first is used.
I am after a script to failover to the alternative sim if a ping times out for 5 minutes.
So if the unit is currently running on sim0 it will fail to sim1 or vise versa, or if the unit is already on sim1 to fail to sim0
I cant work out the commands to run to find out the current sim and to start an if command
expected replies from command : show cellular 0  security
Active SIM = 0
or
Active SIM = 1
track 1 ip sla 10 reachability
 delay down 10 up 10
ip sla 10
 icmp-echo 8.8.8.8 source-interface Vlan1
 frequency 300
ip sla schedule 10 life forever start-time now
event manager applet SimFailover
 event track 1 state down
 action 0.1 ##### work out value of active sim
 action 0.2 ##### save value
 action 0.3 ##### if value equals 0
 action 0.4 cli command "cellular 0 lte sim activate slot 1"
 action 1.1 else
 action 1.2 cli command "cellular 0 lte sim activate slot 0"

Hello Kuat,
You should only have one chat script with no profile defined.
Example:
chat-script gsm "" "AT!SCACT=1" TIMEOUT 60 "OK"
instead this,
chat-script gsm "" "AT!SCACT=1,4" TIMEOUT 60 "OK"
chat-script gsm "" "AT!SCACT=1,5" TIMEOUT 60 "OK"
Then you should specify on controller cellular 0, what profile should be used for each sim:
controller Cellular 0
 gsm sim profile 4 slot 1
 gsm sim profile 5 slot 0
Now you sould be able to use both profiles depending on what SIM is active.
Hope that helps,
Bruno Petrónio

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