[nitrous9200]

The NAI is the Network Access Identifier which as far as I can tell is used for authenticating the data connection. The OP is most likely trying to change it to use the Omnia on a different provider which of course requires changing from the default Verizon NAI but is having trouble trying to get the changed setting to remain. Unfortunately I've never done this before so I can't really help you much. What programs are you using to try and do this? Samsung PST, QPST? perhaps you should search Google for "samsung pst i910" and maybe that might help. Otherwise I don't have any specific advice for you.