# Sierra EM7455 Module dual sim slot

**URL:** <https://forum.sierrawireless.com/t/sierra-em7455-module-dual-sim-slot/17335>\
**Category:** Uncategorized\
**Created:** [August 21, 2019, 1:23pm UTC](https://forum.sierrawireless.com/t/sierra-em7455-module-dual-sim-slot/17335 "2019-08-21T13:23:24Z")\
**Posts on this page:** 1\
**Showing post:** 3

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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:** [December 6, 2019, 11:01am UTC](https://forum.sierrawireless.com/t/sierra-em7455-module-dual-sim-slot/17335/3 "2019-12-06T11:01:40Z")

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Hi,

You can try using AT!UIMS command to switch to other SIM with some AT commands as below.  
Please make sure the APN and frequency band are corrected with each SIM card to connect cellular network.  
I have attached the log file for your reference.[UIMS.txt](https://forum.sierrawireless.com/uploads/short-url/i8uEuuZJGxCQmkaNtAoEeRkO6Ek.txt) (4.9 KB)

 ![UIMS](https://us1.discourse-cdn.com/flex025/uploads/sierrawireless/original/2X/1/1b53247740350f71e68af8b8b3b2b494b9e26844.jpeg)

AT!ENTERCND=“A710”  
AT!CUSTOM?

!CUSTOM:  
GPSENABLE 0x01  
GPIOSARENABLE 0x01  
GPSSEL 0x01  
IPV6ENABLE 0x01  
UIM2ENABLE 0x01 --\> UIM2ENABLE is enable   
SIMLPM 0x01  
USBSERIALENABLE 0x01  
SINGLEAPNSWITCH 0x01

OK  
AT!UIMS?  
AT+CCID  
AT+CEREG?  
AT!UIMS=1  
AT+CCID  
AT+CEREG?

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