The value of tmnxMobPdnApnSelectSubscribed specifies if the subscribed
verified selection mode is allowed or not. Selection mode
verification will be used to ensure a Mobile Station's (MS)
subscription to use this APN. This setting must mach the corresponding
setting on the SGSN/MME. If the two settings are not identical, the
PGW/GGSN rejects the session with a cause code user authentication
failed.