# Help with SIM

**URL:** <https://forum.sierrawireless.com/t/help-with-sim/5300>\
**Category:** Legacy AirPrime modules\
**Created:** [October 23, 2011, 11:43pm UTC](https://forum.sierrawireless.com/t/help-with-sim/5300 "2011-10-23T23:43:54Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![chitex](https://avatars.discourse-cdn.com/v4/letter/c/e36b37/32.png) [@chitex](https://forum.sierrawireless.com/u/chitex)\
**Post date:** [October 23, 2011, 11:43pm UTC](https://forum.sierrawireless.com/t/help-with-sim/5300/1 "2011-10-23T23:43:54Z")

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Hello i hope someone of you can help me.

I build my WiSMo board, i used DALC208SC6 and ESDA6V1SC6 (as is in the PDF document for desing) for interfacing SIM. I connect the device, then power ON. I used Discovery Tool for test it, for here all is ok, but suddenly it appears that SIM is no connected, so i cannot do anymore… (see pictures below)

![](http://img838.imageshack.us/img838/6306/wismo01.png)

![](http://img148.imageshack.us/img148/8468/wismo02.png)

Any attempt of use my device results in +CMS ERROR 310 (Not SIM inserted).

Is there any power source problem? I used a battery from a Nokia Cell. (3.6V nominal, full charged).

Is there other kind of problem?

Thanks in advance!

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**Author:** ![Rex\_alex](https://avatars.discourse-cdn.com/v4/letter/r/73ab20/32.png) [@Rex\_alex](https://forum.sierrawireless.com/u/Rex_alex)\
**Post date:** [November 9, 2011, 11:00am UTC](https://forum.sierrawireless.com/t/help-with-sim/5300/2 "2011-11-09T11:00:10Z")

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Hi,

Can you try testing the same scenario with standard AT commands ?? Try to connect to Hyperterminal and check if you can access the SIM. May be there is a issue with the Discovery tool.