Is it mandatory that you have internet as part of you service for these phones
PLEASEEEE, do a search and you'd be amazed of what you find.
Yes, you must take the data plan....... I know, I hate it too..... I dont use it at all, except that you have to use it for updates and different stuff to make it work.
Besides they need $$$$$
Yes, UNLESS you bring your own CPE (Customer Provided Equipment) to the table and activate it on your already established account.