Can't connect to LTE CAT-M1 and NB-IOT in VietnamNo LTE connection

[Phuoc]

I live in Vietnam,I try to use NRF9160 dev board to connect LTE and NB-IOT but device cannot connect to the LTE/NBIOT network. I am using the at_client example with nRFconnect v3.3.0 LTE link monitor, and the device is always searching, but cannot find the network. 

Here is the picture of the link monitor window for the network. 

[Håkon Alseth]

Hi,

 

The "7" at the end of the CEREG output, indicates that you are on M1, and not NB1.

Can you reset your device, ensure that you see "AT Host sample started" then issue this:

AT%XSYSTEMMODE=0,1,0,0
AT+CFUN=0

 

Then you can reset the board again. The AT+CFUN=0 will store current settings, so you do not need to set NB1 directly on this board again.

 

Kind regards,

Håkon