# SMS sending problem with FMC920

**URL:** <https://community.teltonika.lt/t/sms-sending-problem-with-fmc920/19704>\
**Category:** Question\
**Created:** [June 12, 2026, 6:32am UTC](https://community.teltonika.lt/t/sms-sending-problem-with-fmc920/19704 "2026-06-12T06:32:39Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![mscag](https://community.teltonika.lt/letter_avatar_proxy/v4/letter/m/6a8cbe/32.png) [@mscag](https://community.teltonika.lt/u/mscag)\
**Post date:** [June 12, 2026, 6:32am UTC](https://community.teltonika.lt/t/sms-sending-problem-with-fmc920/19704/1 "2026-06-12T06:32:40Z")

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A newbie question: After providing DC current (through DC and GND cables) to my new FMC920 in my office, I connected to it through Configurator. The device recognised the SIM card and started sending location data to Traccar server over GPRS.

Following the manual, I tried sending SMS commands but the device does not respond. The " setparam" command doesn’t change any configuration. Even the " getinfo" command does not report anything. Status → GSM-Info → SMS-Count → ReceivedSMS increases with every SMS the device receives, but SentSMS is always 0(zero)

Any idea ?

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**Author:** ![Naveen](https://community.teltonika.lt/letter_avatar_proxy/v4/letter/n/f07891/32.png) [@Naveen](https://community.teltonika.lt/u/Naveen)\
**Post date:** [June 12, 2026, 10:11am UTC](https://community.teltonika.lt/t/sms-sending-problem-with-fmc920/19704/2 "2026-06-12T10:11:10Z")

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Dear Team,

If no login and password have been configured for SMS commands in the device configuration, two blank spaces must be added before the command.

For example, to send the getinfo command, it should be preceded by two blank spaces.

Best regards,  
Naveen

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<div class="post-metadata">

**Author:** ![mscag](https://community.teltonika.lt/letter_avatar_proxy/v4/letter/m/6a8cbe/32.png) [@mscag](https://community.teltonika.lt/u/mscag)\
**Post date:** [June 12, 2026, 10:35am UTC](https://community.teltonika.lt/t/sms-sending-problem-with-fmc920/19704/3 "2026-06-12T10:35:54Z")

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Hi,

Thanks for the reply.

SMS/CALLSettings → SMS\_Commands → Login & Password are both empty. And yes, the two blank spaces have allways been inserted before the command. Using a mobile phone, I have also made sure that the SIM card can send SMS messages.

Regards

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<div class="post-metadata">

**Author:** ![Naveen](https://community.teltonika.lt/letter_avatar_proxy/v4/letter/n/f07891/32.png) [@Naveen](https://community.teltonika.lt/u/Naveen)\
**Post date:** [June 12, 2026, 11:14am UTC](https://community.teltonika.lt/t/sms-sending-problem-with-fmc920/19704/4 "2026-06-12T11:14:03Z")

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Hi,

Have you configured any mobile numbers in the Authorized Numbers section?

Additionally, please ensure that the SIM card inserted in the device has outgoing SMS service enabled.

Best regards,

Naveen

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<div class="post-metadata">

**Author:** ![mscag](https://community.teltonika.lt/letter_avatar_proxy/v4/letter/m/6a8cbe/32.png) [@mscag](https://community.teltonika.lt/u/mscag)\
**Post date:** [June 12, 2026, 11:44am UTC](https://community.teltonika.lt/t/sms-sending-problem-with-fmc920/19704/5 "2026-06-12T11:44:34Z")

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Hi Naveen,

I added my sender number in three different lines as “XXyyyy504727”, “+XXyyyy504727” and “504727” into the list, XX being the country code. When I tried without username and password, I received the logs below.  
[2026.06.12 11:12:49]-[SMS.PRS] [SMS INBOX] GSM Number:XXyyyy504727 | Text:{?H??@ ggps}  
[2026.06.12 11:12:49]-[SMS.PRS] Long Number detected! Comparing by 6 Digits  
[2026.06.12 11:12:49]-[SMS.PRS] Camparing number: 504727. Check len:6, num len:12  
[2026.06.12 11:12:49]-[SMS.PRS] ERROR @ m2m\_sms\_cmd\_handler.c(295):Wrong User Login or Password!  
[2026.06.12 11:12:49]-[MOD.TSK] WARNING @ 228:SMS Cmd Not Found!  
[2026.06.12 11:12:49]-[ATCMD] \<\<AT+CMGD=0

After assigning 1 as the username and 2 as the password, I received the logs below;  
[2026.06.12 11:10:50]-[SMS.PRS] [SMS INBOX] GSM Number:XXyyyy504727 | Text:{?H??@1 2 getinfo}  
[2026.06.12 11:10:50]-[SMS.PRS] Long Number detected! Comparing by 6 Digits  
[2026.06.12 11:10:50]-[SMS.PRS] Camparing number: 504727. Check len:6, num len:12  
[2026.06.12 11:10:50]-[SMS.PRS] ERROR @ m2m\_sms\_cmd\_handler.c(295):Wrong User Login or Password!  
[2026.06.12 11:10:50]-[MOD.TSK] WARNING @ 228:SMS Cmd Not Found!  
[2026.06.12 11:10:50]-[ATCMD] \<\<AT+CMGD=0

It is interesting to see some characters at the beginning of each SMS message. Can this be related with my problem ?

Regards.

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<div class="post-metadata">

**Author:** ![mscag](https://community.teltonika.lt/letter_avatar_proxy/v4/letter/m/6a8cbe/32.png) [@mscag](https://community.teltonika.lt/u/mscag)\
**Post date:** [June 14, 2026, 4:56pm UTC](https://community.teltonika.lt/t/sms-sending-problem-with-fmc920/19704/6 "2026-06-14T16:56:24Z")

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Hi,

The issue has evolved into a strange one. I have tried 2 more mobile phones when sending SMS commands, and it seems that FMC920 does not accept commands from iPhone’s but do accept from Samsung/Android. Any idea how I can resolve this ?

Regards.

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<div class="post-metadata">

**Author:** ![furry](https://community.teltonika.lt/letter_avatar_proxy/v4/letter/f/e19adc/32.png) [@furry](https://community.teltonika.lt/u/furry)\
**Post date:** [September 23, 2026, 11:53am UTC](https://community.teltonika.lt/t/sms-sending-problem-with-fmc920/19704/7 "2026-09-23T11:53:51Z")

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My FMC920 gives no response to SMS, whether I use an iPhone or Android to send the command, and despite all the conditions stated in this thread having been satisfied.

Nor does it return any SMS when I 'phone it.

It does, though, send ‘AutoGeofence’ SMS.

Firmware is latest.