# Dual-Sim in EM919X

**URL:** <https://forum.sierrawireless.com/t/dual-sim-in-em919x/24283>\
**Category:** MC/EM Series\
**Created:** [July 18, 2021, 9:28am UTC](https://forum.sierrawireless.com/t/dual-sim-in-em919x/24283 "2021-07-18T09:28:43Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![firas.abdelghani](https://avatars.discourse-cdn.com/v4/letter/f/edb3f5/32.png) [@firas.abdelghani](https://forum.sierrawireless.com/u/firas.abdelghani)\
**Post date:** [July 18, 2021, 9:28am UTC](https://forum.sierrawireless.com/t/dual-sim-in-em919x/24283/1 "2021-07-18T09:28:43Z")

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How is the Dual Sim feature is used in EM919X?  
is there a reference schematic that shows the pinout and the selection between two different sim cards while using the M.2 Interface?  
I’m also interested in EM7455, I saw that it’s pinout supports additional SIM, but I didn’t see that in EM919X, what is the reason?

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**Author:** ![Donald](https://avatars.discourse-cdn.com/v4/letter/d/ac8455/32.png) [@Donald](https://forum.sierrawireless.com/u/Donald)\
**Post date:** [July 19, 2021, 5:06am UTC](https://forum.sierrawireless.com/t/dual-sim-in-em919x/24283/2 "2021-07-19T05:06:20Z")

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Hi firas.abdelghani

Currently, the EM919x product supports MB Multi-SIM operations( internal SIM(eSIM) + external SIM) from native Windows UI

Test Steps:  
Step1:Moudle connect the Windows PC  
Step2.:Open the Windows network and internet settings  
Step3:Open the Cellular, Choose the SIM1, check the Windows UI has changed the cellular data for SIM1  
Step4:Choose the SIM2 for cellular data, Check the windows UI, it has changed the cellular data for SIM2.

Please help to tick “Solutions” if your question is answered.

 ![SIM1](https://us1.discourse-cdn.com/flex025/uploads/sierrawireless/original/2X/8/8dd931c0abaefbd34eb7df205ff85809d4a097e3.jpeg)  
 ![image](https://us1.discourse-cdn.com/flex025/uploads/sierrawireless/original/2X/3/3a470c82e8c82e75e0f2c2291e76ac671ed22ac8.png)