# Can't send messages and make calls

**URL:** <https://forum.sierrawireless.com/t/cant-send-messages-and-make-calls/5177>\
**Category:** Legacy AirPrime modules\
**Created:** [August 4, 2011, 1:27pm UTC](https://forum.sierrawireless.com/t/cant-send-messages-and-make-calls/5177 "2011-08-04T13:27:07Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![skalexey](https://avatars.discourse-cdn.com/v4/letter/s/977dab/32.png) [@skalexey](https://forum.sierrawireless.com/u/skalexey)\
**Post date:** [August 4, 2011, 1:27pm UTC](https://forum.sierrawireless.com/t/cant-send-messages-and-make-calls/5177/1 "2011-08-04T13:27:07Z")

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I work with SL6087 module and there are problems that I can’t solve. My distributor has not helped me yet, so I hope you’ll help me. The GSM network and the SIM card are detected successfully and the level of a signal is hight, but I can’t send SMS and make calls (but it works with another device - Q24PL).

If SIM card is not inserted, the module returns

+WIND: 3

+WIND: 0

+WIND: 7

and AT+CSQ returns a value about 18-20

+CSQ: 20,0

But when SIM card is inserted I get strange result - sometimes the network is lost and after 30 minutes I have following result

+WIND: 8

+WIND: 7

+WIND: 8

+WIND: 7

(so there are moments when the network is available (5-10 minutes) and moments when network is lost (1-5 minutes) )

and AT+CSQ returns variable results

AT+CSQ  
+CSQ: 99,99  
OK

AT+CSQ  
+CSQ: 25,99  
OK

AT+CSQ  
+CSQ: 99,99  
OK

AT+CSQ  
+CSQ: 14,99  
OK

AT+CSQ  
+CSQ: 14,0  
OK

And results of ATD and AT+CGMS commands are as follow

ATD89031577934;  
+WIND: 5,1  
OK  
+WIND: 6,1

AT+CMGS=“89031577934”

> Test…  
> ERROR

(it also works so with my country code +7 and I have tried all possible variants of syntax of these commands)

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<div class="post-metadata">

**Author:** ![skalexey](https://avatars.discourse-cdn.com/v4/letter/s/977dab/32.png) [@skalexey](https://forum.sierrawireless.com/u/skalexey)\
**Post date:** [August 9, 2011, 5:25pm UTC](https://forum.sierrawireless.com/t/cant-send-messages-and-make-calls/5177/2 "2011-08-09T17:25:50Z")

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The problem was solved. It was a problem of VBATT line. My VBATT line was too narrow and the module couldn’t turn a transfer procedure on.

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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:** [August 9, 2011, 5:41pm UTC](https://forum.sierrawireless.com/t/cant-send-messages-and-make-calls/5177/3 "2011-08-09T17:41:09Z")

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FAQ!

[https://forum.sierrawireless.com/t/faq-forum-wiki/3491/1](https://forum.sierrawireless.com/t/faq-forum-wiki/3491/1)