# \[q2686; R74\] SIM not present but +CREG reports home network

**URL:** <https://forum.sierrawireless.com/t/q2686-r74-sim-not-present-but-creg-reports-home-network/4277>\
**Category:** Open AT\
**Created:** [March 10, 2010, 12:24am UTC](https://forum.sierrawireless.com/t/q2686-r74-sim-not-present-but-creg-reports-home-network/4277 "2010-03-10T00:24:31Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![imatveev13](https://avatars.discourse-cdn.com/v4/letter/i/fbc32d/32.png) [@imatveev13](https://forum.sierrawireless.com/u/imatveev13)\
**Post date:** [March 10, 2010, 12:24am UTC](https://forum.sierrawireless.com/t/q2686-r74-sim-not-present-but-creg-reports-home-network/4277/1 "2010-03-10T00:24:31Z")

</div>

Hello All,  
the board I’m using has SIMPRESS line not connected to the SIM holder but always high.  
If I remove SIM after network registration (GSM LED blinking, registration event received in embedded app)  
in about 20 sec. GSM LED turns constant on, but AT+CREG? still reports:  
+CREG: 0,1  
i.e I’m still connected to the home network.  
Constant GSM LED tells that the firmware knows the SIM was removed, but +CREG wont tell me about that.  
Any idea how to get the info about the SIM status from the firmware?

---

<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:** [March 10, 2010, 12:32am UTC](https://forum.sierrawireless.com/t/q2686-r74-sim-not-present-but-creg-reports-home-network/4277/2 "2010-03-10T00:32:39Z")

</div>

Any SIM-related AT command would give a suitable error?

---

<div class="post-metadata">

**Author:** ![imatveev13](https://avatars.discourse-cdn.com/v4/letter/i/fbc32d/32.png) [@imatveev13](https://forum.sierrawireless.com/u/imatveev13)\
**Post date:** [March 12, 2010, 6:23pm UTC](https://forum.sierrawireless.com/t/q2686-r74-sim-not-present-but-creg-reports-home-network/4277/3 "2010-03-12T18:23:53Z")

</div>

For now I’m using AT+CIMI to check if the SIM is there, but this is kind of not strait 🙂.

---

<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:** [March 12, 2010, 6:58pm UTC](https://forum.sierrawireless.com/t/q2686-r74-sim-not-present-but-creg-reports-home-network/4277/4 "2010-03-12T18:58:43Z")

</div>

If you want it “straight”, then you really need to use the SIM presence signal - that’s what it’s there for!

Anything else is just a bodge!