# Sierra LTE em7455 Module sim slot ??

**URL:** <https://forum.sierrawireless.com/t/sierra-lte-em7455-module-sim-slot/17333>\
**Category:** MC/EM Series\
**Created:** [August 21, 2019, 1:23pm UTC](https://forum.sierrawireless.com/t/sierra-lte-em7455-module-sim-slot/17333 "2019-08-21T13:23:10Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![lan](https://avatars.discourse-cdn.com/v4/letter/l/df788c/32.png) [@lan](https://forum.sierrawireless.com/u/lan)\
**Post date:** [August 21, 2019, 1:23pm UTC](https://forum.sierrawireless.com/t/sierra-lte-em7455-module-sim-slot/17333/1 "2019-08-21T13:23:10Z")

</div>

I use this command to switch to other SIM…

#AT!UIMS=\<uim\_slot\>

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?

---

<div class="post-metadata">

**Author:** ![anon56110884](https://avatars.discourse-cdn.com/v4/letter/a/ecb155/32.png) [@anon56110884](https://forum.sierrawireless.com/u/anon56110884)\
**Post date:** [September 23, 2019, 9:40pm UTC](https://forum.sierrawireless.com/t/sierra-lte-em7455-module-sim-slot/17333/2 "2019-09-23T21:40:58Z")

</div>

Hi @lan  
The modem only supports one active SIM at any time. When the slot is switched, then the SIM in the new slot is activated and the older one will become inactive.