# Can not detect external SIM on mangOH Red board

**URL:** https://mangoh.discourse.group/t/can-not-detect-external-sim-on-mangoh-red-board/5194
**Category:** mangOH Red
**Created:** [September 11, 2020, 6:43pm UTC](https://mangoh.discourse.group/t/can-not-detect-external-sim-on-mangoh-red-board/5194 "2020-09-11T18:43:30Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![kalpitkadia](https://avatars.discourse-cdn.com/v4/letter/k/13edae/32.png) [@kalpitkadia](https://mangoh.discourse.group/u/kalpitkadia)
#### Post date: [September 11, 2020, 6:43pm UTC](https://mangoh.discourse.group/t/can-not-detect-external-sim-on-mangoh-red-board/5194/1 "2020-09-11T18:43:30Z")

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Hi,

I am using external physical SIM(UIMS=0) on manOH Red board with Sierra RC7611, but for some reason RC7611 is not detecting external SIM. However I am able to see embedded SIM(UIMS=1) on RC7611. Also we tried with different physical SIMs, none of them worked in the slot.

See AT command response below:

Manufacturer: Sierra Wireless, Incorporated

Model: RC7611

Revision: SWI9X07H\_00.03.03.00 2bb7a4 jenkins 2020/04/15 07:57:29

IMEI: 352138110XXXXXX

IMEI SV: 14

FSN: 6M008285XXXXXX

+GCAP: +CGSM

OK

at!uims?

!UIMS: 0

OK

at+cpin?

+CME ERROR: SIM not inserted

Does anyone know what could be issue? Hardware? or Sierra Module?

Thanks,  
Kalpit

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<div class="post-metadata">

### Author: ![jyijyi](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/jyijyi/32/997_2.png) [@jyijyi](https://mangoh.discourse.group/u/jyijyi)
#### Post date: [September 21, 2020, 2:23am UTC](https://mangoh.discourse.group/t/can-not-detect-external-sim-on-mangoh-red-board/5194/2 "2020-09-21T02:23:54Z")

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I don’t see problem on my mangoh red board:

at!impref?  
!IMPREF:  
preferred fw version: 00.02.14.00  
preferred carrier name: GENERIC  
preferred config name: GENERIC\_001.031\_000  
preferred subpri index: 000  
current fw version: 00.02.14.00  
current carrier name: GENERIC  
current config name: GENERIC\_001.031\_000  
current subpri index: 000

OK

at!uims?  
!UIMS: 0

OK  
ati3  
Manufacturer: Sierra Wireless, Incorporated  
Model: RC7611  
Revision: SWI9X07H\_00.02.14.00 ab458a jenkins 2020/03/03 05:50:56  
IMEI: 352138110002575  
IMEI SV: 10  
FSN: 6M941280161002  
+GCAP: +CGSM

OK  
at+cpin?  
+CPIN: READY

OK