Problem connecting with NB-Iot

[mortenbjork]

Hi, I have searched the forum, but not found anything that helped me. Hope someone knows

I have issues connecting to  NB-IoT, no problem connection to LTE-M. 

I'm running with these parameters in prj.conf:

## Network Mode / LTE category

CONFIG_LTE_NETWORK_MODE_LTE_M_NBIOT=y

CONFIG_LTE_NETWORK_MODE_LTE_M=n

CONFIG_LTE_LINK_CONTROL_LOG_LEVEL_DBG=y

##

Here is what the application is printing:

The final error before using fallback and then it OK connects to LTE-M is:

D: LTE mode not found, error code: -22

___________________________________________

I: LTE Link Connecting...
D: System mode (5) and preference (0) configured
D: +CEREG notification: +CEREG: 2,"0CB6","01FE9012",9

D: Network registration status: 2
D: LTE mode: 9
D: +CSCON notification
D: +CEREG notification: +CEREG: 2,"0CB6","01FE9012",9,0,14

D: Network registration status: 2
D: LTE mode: 9
D: +CSCON notification
D: +CEREG notification: +CEREG: 2,"A3AD","031D6065",9

D: Network registration status: 2
D: LTE mode: 9
D: +CSCON notification
D: +CEREG notification: +CEREG: 2,"A3AD","031D6065",9,0,19

D: Network registration status: 2
D: LTE mode: 9
D: +CSCON notification
D: +CEREG notification: +CEREG: 2

D: Network registration status: 2
D: LTE mode not found, error code: -22
I: Network connection attempt timed out
D: +CEREG notification: +CEREG: 0

D: Network registration status: 0
D: LTE mode not found, error code: -22
I: Using fallback network mode
D: +CEREG notification: +CEREG: 2,"7C9D","031D6001",7

D: Network registration status: 2
D: LTE mode: 7
D: +CSCON notification
D: +CEREG notification: +CEREG: 5,"7C9D","031D6001",7,,,"11100000","11100000"

D: Network registration status: 5
D: LTE mode: 7
I: LTE Link Connected!

[JONATHAN LL]

Do you have SIM/subscription service that supports NB-IOT. Not all providers does. 

If you are using a iBasis or one of the Telenor sim cards we provide with our devices then NB-IoT does not work as far as I am aware. 

But both Telia and Telenor does have good IoT coverage but just to be sure you can check you location here:
https://www.telia.no/nett/dekning/ 
https://www.telenor.no/bedrift/iot/dekning/ 

Regards,
Jonathan

[mortenbjork]

Hi Jonathan, thanks for your reply. 

I'm using Hologram sim, roaming on Telia. It didn't occur to me that it could be an issue with the sim/subscription. But you are absolutely right, hologram does not support roaming in Norway on NB-IoT yet. 

Sorry for the post

Morten