QUECTEL EC200T unable to connect to internet

Just wondering if anyone else experiencing internet connection problem? It seems like the error is like DNS can’t be resolved, and I don’t have the capacity to connect to the internet. Thanks.

What method or protocol do you use to connect to the Internet?
Can you PING Google or other Internet according to QPING?

@herbert.pan-Q thanks for your reply. I think the protocol this router uses is PDP, but not sure though. Is there a way I can check what protocol this uses using the AT commands? Also, here’s the result of the QPING…