Sierra EM7455 Module dual sim slot

I use this command to switch to other SIM…


But it disconnects the cellular connection in currently selected SIM.

My purpose here is to check SIM status without actually switching to it using AT Command.

How should it be implemented?

Hi ChanningLan,

Have you made any findings yet?

I come across the same situation here, I would like to tell if another, un-activated slot has a SIM in it or not. If I can do this, then I can workaround a situation that using UIMS AT command to change to an empty slot will make the modem unable to use this command to change back to the slot with a SIM.