MC7455 dual sim standby how to use ?

IoT Modules MC/EM Series
1

Hello,
we are facing troubles using sim hotswap feature.
We did dual sim interface accordingly to SL guidelines but no matter of AT!CUSTOM=“SIMHOTSWAPDIS” param we always get IMSI (AT+CIMI) of primary sim card. SL forum doesn’t say anything. In manuals nothing much about it. How to switch data connections between 2 sims ?
How to get access to secondary SIM thru GobiSerial (to disable PIN code for example)?

2

Try to execute AT$QCSIMAPP? command (with both SIM cards inserted) first and show the answer here.

3

AT$QCSIMAPP?
$QCSIMAPP: 0,“SUB1”,“L”

both of sims inserted…

4

Well, now check if second SIM intreface is enabled:

AT!CUSTOM?

You have to see the UIM2ENABLE variable set to 1.
If it’s not set, try to do this:

AT!ENTERCND="A710"
AT!CUSTOM="UIM2ENABLE",1

If above operation is succsessful, you will get an ability to select 2nd SIM with !UIMS command:

AT!UIMS=1

and switch back to 1st SIM with

AT!UIMS=0