GNSS, AGPS, and modem DFU are not part of the generic sockets. Therefore, operating on them using poll is not possible.

PDN sockets only support open, close, setsockopt, and getsockopt to configure a PDN with an APN name. Therefore, there is no data communication on the socket, and it is not pollable.

Modem firmware limitations

For a detailed description of limitations related to the modem firmware used, refer to the changelog of that specific version. The changelog is distributed as part of the downloadable zip file.