EC01 attach problem

I am unable to attach the EC01F module with network ,
I am from India and I am using "Jio NB-IoT" sim card with proper NB-IoT antenna as well ,still I am unable to attach to network. It gives CME ERROR +308 .
Also every time when I check signal quality (AT+CSQ) the result gives 99,99. What are the ways to get attached to the network.

Please help me regarding this issue.

I am very want to help you. But unfortunately, i don't have this model.  

308 is the terminal error code. The main reasons for the error are as follows:
1、Internet of things card has no traffic;
2、The SIM card is not plugged in properly, so it is recommended to check the SIM card ID first;
3、The SIM card is bound and other devices cannot be used.

18350766600@139 发表于 2023-10-11 09:56
308 is the terminal error code. The main reasons for the error are as follows:
1、Internet of things ...

All the things are properly checked

Akhil 发表于 2023-10-19 15:21
All the things are properly checked

Same issue here in France.
Have you been able to find a workaround?!
My module blue LED does not blink or anything, meaning there is no connection and i get +CSQ:99,99 in Serial Tool.