nRF9160 DK - Unable to establish connection with nRF Cloud

[sunrise shen]

Hello, I lived in Taiwan and I followed nRF9160 DK Getting Started and met a problem at establishing connection with nRF Cloud with my board.

The previous steps are all successful but my LED3 light on and LED4 off in the end even if I reset several times.

I read the terminal at LTE Link Monitor said it can connect to LTE network but it failed to connect to the cloud when it tried.

I don't know how to solve this problem because my firmware had updated successfully and my SIM also had already linked to my account( SIM number: "8931080520********")

below is the link to part of my terminal messages.

https://drive.google.com/file/d/1O-nTQ6WtPbMdWTaRcf1gJjUgDPzNsyxj/view?usp=sharing

thanks for your answers.

sunrise

[sunrise shen]

Thank you for your help and reply.

I'm very sorry for the delay to reply because I am a little busy recently.

And I finally found why's wrong. It's because I didn't type "nrf-" before my digit IMEI when I downloaded the Device Certificates.

Finally, it's my pleasure to receive your help that guild me in a direction to find my problem.

Best regard,

Sunrise