SMS example not work

[DannisWong]

Hi, recently testing nrf9160 SMS example, but seems not working in both Send/Receive

I confirm that SMS is valid in my SIM Card, I put it in my mobile phone and verified

when I put it in DK and run SMS example, it get below error

any one can help?

*** Booting Zephyr OS build v2.7.99-ncs1-1 ***

SMS sample starting

SMS sample is ready for receiving 
messages

Sending SMS: number=+852xxxxxxxx, text="SMS sample: testing"

sms_send returned err: 196939

[00:00:07.416,107] 

[0m<dbg> sms.sms_init: SMS client successfully registered

[0m

[00:00:07.425,354] 

[0m<dbg> sms.sms_submit_send: Sending SMS to number=+852xxxxxxxx, text='SMS sample: testing'

[0m

[00:00:07.425,354] 

[0m<dbg> sms.sms_submit_encode_number: Ignoring leading '+' in the number

[0m

[00:00:07.425,750] 

[0m<dbg> sms.sms_submit_encode: Sending encoded SMS data (length=30):

[0m

[00:00:07.425,781] 

[0m<dbg> sms.sms_submit_encode: AT+CMGS=30

0021000B915892258343F1000013D3E614~

[0m

[00:00:07.426,483] 

[1;31m<err> sms: Sending AT command failed, err=196939

[0m

[Charlie]

Hi Dannis,

In general, the mobile phone SIM card is not compatible with Cellular IoT devices.

You need to apply for a Cellular IoT SIM card from LTE-M/NB-IoT network operator and confirm with the operator that they have SMS support.

Best regards,

Charlie

[DannisWong]

HI

Its the Iot SIM from NB-Iot network, its used in Assert Tracker V2 example and fully work in nrf-cloud connection, and its support SMS, put into a mobile just to verify can send / receive SMS

[DannisWong]

HI

I found some information and would like to have confirmation, I found a document which said that SMS only supported in LTE-M and not in NB-Iot network, is it correct?

If yes, is that any solution to it work?

[Charlie]

Hi Dannis,

I can share some information I already collected:

1)From the latest GSMA NB-IoT Deployment Guide v3, it describes: SMS (Short Message Service) and SCEF has not been included among the key minimum features in this edition, although considerations for both features have been provided. SMS Support for NB-IoT is optional for NB-IoT network operaters.

2)Webinar LTE-M vs NB-IoT(November 2020) from Telenor also mentioned "SMS is available in LTE-M networks, while SMS is often not supported on NB-IoT."

3)Our limited internal test cases also show some NB-IoT operators support SMS but others do not like half/half. There is no information related to China Mobile and 3HK.

I have contacted our local FAE John So, and he will contact the distributor to help double-check with the local network operators. There is no solution for SMS if your network operator does not support it.

Best regards,

Charlie