Hi akn,
It looks like that the APN in CID 1 and 3 are the same. Both CID 1 and CID 3 are using " vzwinternet", that could be the reason that you can not activate the CID 3.
Please configure CID 1 with other APN (by default, it is " vzwims")
The CID 3 is empty, or “vzwinternet”. And then detach and attach module again with AT+CGATT