# SL8080T SIM card detection problem

**URL:** <https://forum.sierrawireless.com/t/sl8080t-sim-card-detection-problem/7386>\
**Category:** Legacy AirPrime modules\
**Created:** [August 15, 2014, 3:04am UTC](https://forum.sierrawireless.com/t/sl8080t-sim-card-detection-problem/7386 "2014-08-15T03:04:10Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![HAMSAKADAYAN](https://avatars.discourse-cdn.com/v4/letter/h/ba8739/32.png) [@HAMSAKADAYAN](https://forum.sierrawireless.com/u/HAMSAKADAYAN)\
**Post date:** [August 15, 2014, 3:04am UTC](https://forum.sierrawireless.com/t/sl8080t-sim-card-detection-problem/7386/1 "2014-08-15T03:04:10Z")

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I just received a prototype board using SL8080T. Most of the stuff are working, USB works, GPIO, EXTINT, etc are also working. I am writing the app using Open AT. But currently no app is loaded to this unit.

But SIM card is not being detected by the module. So I cannot connect to the network at all. (We have another hand soldered prototype board that works, the SIM card connections are based on the SL8080T recommendations) All connections look fines to me. I can see 1.8v and 3.v going through the SIM\_VREG lines at the startup for few seconds and then low after that. Seems like it can’t talk to the SIM or some configuration issue.

ANY HELP WOULD BE Appreciated.  
Thanks,

at+cfun=1  
OK

+WIND: 13

+WIND: 0

+CREG: 0

at+cpin?  
+CME ERROR: 10

at+creg?  
+CREG: 2,0

OK  
at+csq  
+CSQ: 99,99

OK

+CME ERROR: 310

ati3  
R7.52.0.201404040850.SL8080T 1790532 040414 08:50

OK  
ati9  
“DWL”," S4\_1\_0\_13BT R2032 CNSZXD00000132 2014/02/26 09:41:35","",“Sierra Wireles  
s”,0,"",“00000000”,“00000000”  
“FW”,“FW\_752\_68.SL808Fx”,“R7.52.0.201404040850.SL8080T”,“Sierra Wireless”,179053  
2,“040414 08:50”,“298b2dad”,“10002020”  
“MODEM 3G+”,“Revision: S4\_1\_0\_13AP R2032 CNSZXD00000132 2014/02/26 09:41:35”  
“OAT”,“3.0”,“Test”,“Test”,411976,“081114 19:29”,“6ecb4876”,“10700000”  
-“Developer Studio”,“2.3.1.201306241059-R11859”  
-“Open AT OS Package”,“6.50.1.A1.201305161238”  
-“Firmware Package”,“7.50.3.A1.201312050709”  
-“Internet Library Package”,“5.53.0.A1.201211071132”  
-“Location Library Package”,“1.4.5.A1.201307251150”  
-“Security Library Package”,“1.15.0.A1.201302081338”  
“ROM”,“8400000”  
“RAM”,“4000000”  
“OATRAM”,“40000”  
“DWLNAME”,“SL808x”

OK

OK  
at!gstatus?  
!GSTATUS:  
Current Time: 1069 Temperature: 36  
Bootup Time: 770 Mode: ONLINE  
System mode: WCDMA PS state: Not attached  
WCDMA band: WCDMA 1900 GSM band: Unknown  
WCDMA channel: 612 GSM channel: 65535  
GMM (PS) state:DEREGISTERED PLMN SEARCH  
MM (CS) state: IDLE NO IMSI  
WCDMA L1 State:L1M\_PCH\_SLEEP RRC State: DISCONNECTED  
RX level (dBm):-97

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<div class="post-metadata">

**Author:** ![awneil](https://avatars.discourse-cdn.com/v4/letter/a/49beb7/32.png) [@awneil](https://forum.sierrawireless.com/u/awneil)\
**Post date:** [August 15, 2014, 6:15am UTC](https://forum.sierrawireless.com/t/sl8080t-sim-card-detection-problem/7386/2 "2014-08-15T06:15:28Z")

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Are you sure that the Power Supply is correct, adequate, and stable ❓

[https://forum.sierrawireless.com/t/airprime-q2687-with-xm0110-gps-module/7373/10](https://forum.sierrawireless.com/t/airprime-q2687-with-xm0110-gps-module/7373/10)

Maybe the SIM issue could be just a side-effect…?

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<div class="post-metadata">

**Author:** ![tank\_duan](https://avatars.discourse-cdn.com/v4/letter/t/8baadc/32.png) [@tank\_duan](https://forum.sierrawireless.com/u/tank_duan)\
**Post date:** [December 5, 2014, 6:06am UTC](https://forum.sierrawireless.com/t/sl8080t-sim-card-detection-problem/7386/3 "2014-12-05T06:06:56Z")

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hi:  
the sl8082t 's simcard event of open at …have issue…i think…because can not give me the sim\_init over evnet…