I had an unlocked Nokia n73 until I got my first bill. It does not work with my favs. That means no matter how you do it (website or T-Mobile) it will not work. You must have a fav 5 compatible phone. I really don't know why so many people say it works. If so, repost and let us know what you did so your unlocked phone will work with my favs. So, to clarify, YOU WILL BE BILLED your normal minutes, even if they are on your fav 5. Just simply call T-Mobile and ask them and they will give you the same answer everytime. Don't trust what your uncle's best friend's girlfriend's techy brother tells you, just call tmo. Hope this helps.