# GSM Not working

**URL:** <https://forum.sierrawireless.com/t/gsm-not-working/1865>\
**Category:** Legacy AirPrime modules\
**Created:** [January 25, 2008, 8:51am UTC](https://forum.sierrawireless.com/t/gsm-not-working/1865 "2008-01-25T08:51:20Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Vanee](https://avatars.discourse-cdn.com/v4/letter/v/f19dbf/32.png) [@Vanee](https://forum.sierrawireless.com/u/Vanee)\
**Post date:** [January 25, 2008, 8:51am UTC](https://forum.sierrawireless.com/t/gsm-not-working/1865/1 "2008-01-25T08:51:20Z")

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Hi,  
im using Q2501. the initialization of GSM is fine. but, it loses GSM coverage when it goes to GSM shadow. wat’s the AT command to check the status of GSM registeration? i tried +CREG? but, once it’s registered, it’s not able to change status when coverage’s lost.  
is there any adl command that can be used? the adl\_simGetState() won’t help as it can say whether the sim is inserted or not.  
Also, the +WIND: 8 message that indicates network is lost or the +WIND:0 message indicating sim removal in between the power up of the device does not pop-up on the hyperterminal.  
It’s urgent. can someone help me out?

Regards,  
S. Vanee

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**Author:** ![awneil](https://avatars.discourse-cdn.com/v4/letter/a/49beb7/32.png) [@awneil](https://forum.sierrawireless.com/u/awneil)\
**Post date:** [January 25, 2008, 9:08am UTC](https://forum.sierrawireless.com/t/gsm-not-working/1865/2 "2008-01-25T09:08:35Z")

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> [@Vanee](#):
>
> wat’s the AT command to check the status of GSM registeration? i tried +CREG? but, once it’s registered, it’s not able to change status when coverage’s lost.

Sonething’s wrong there!

AT+CREG? most certainly should give the current registration state; for example:

```auto
at+creg?
+CREG: 0,1 -- Registered, Home Network

OK
               -- Antenna disconnected here

+WIND: 8 -- Network Lost

at+creg?
+CREG: 0,2 -- Not registered, searching.

OK
```

You can enable unsolicited +CREG responses - then you’ll be advised whenever the registration state changes.

> [@](#):
>
> Also, the +WIND: 8 message that indicates network is lost or the +WIND:0 message indicating sim removal in between the power up of the device does not pop-up on the hyperterminal.

Have you enabled them?  
They are disabled by default…

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<div class="post-metadata">

**Author:** ![Vanee](https://avatars.discourse-cdn.com/v4/letter/v/f19dbf/32.png) [@Vanee](https://forum.sierrawireless.com/u/Vanee)\
**Post date:** [January 25, 2008, 9:18am UTC](https://forum.sierrawireless.com/t/gsm-not-working/1865/3 "2008-01-25T09:18:06Z")

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hi,  
how to enable unsolicited creg & wind?

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**Author:** ![awneil](https://avatars.discourse-cdn.com/v4/letter/a/49beb7/32.png) [@awneil](https://forum.sierrawireless.com/u/awneil)\
**Post date:** [January 25, 2008, 9:27am UTC](https://forum.sierrawireless.com/t/gsm-not-working/1865/4 "2008-01-25T09:27:16Z")

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> [@Vanee](#):
>
> how to enable unsolicited creg & wind?

This is all in the AT Commands Interface Guide - you have to read it!

For use with an Open-AT application, be sure to read the section “Inner AT commands configuration” in the ADL User Guide…

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**Author:** ![junaid123](https://avatars.discourse-cdn.com/v4/letter/j/7ab992/32.png) [@junaid123](https://forum.sierrawireless.com/u/junaid123)\
**Post date:** [January 25, 2008, 11:11am UTC](https://forum.sierrawireless.com/t/gsm-not-working/1865/5 "2008-01-25T11:11:47Z")

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My wavecom Q2501B was working well but suddenly it stops responding. Evev it doesn’t echos the typed character. even then it continuously sends the WIND:3 then WIND:0.  
What could be the problem…  
If anybody have any idea please do let me know.  
Regards.