I don't know what the other poster's agendas are, but they're wrong.

I've got an employee plan that is almost 10 years old and, so long as I don't try to scam Sprint by putting it on an unauthorized phone, Sprint isn't changing my plan. Last year they even sent me a free (upgrade) phone and still left my plan alone. Also - I am able to transfer the plan to anyone else so long as they obey the rules too.