Re the phone: take the phone away from him and TELL him it has been cut off. That's not a lie, because YOU'RE cutting HIM off!
Then lock the phone in the trunk of your car or keep it at work or smash it with a hammer or something. Tell him if having a phone is that important to him, he has to get his own in his own name.
Girl, you're "yes-butting" this thing to death. Somethin's gotta give!
You're feeling totally powerless, and that's understandable. You can't reclaim all of your power at once, but you have to start somewhere. The discomfort you're feeling is a signal that you're getting fed up, and that's good.
As I usually recommend to someone in this sitch, visit a few alanon meetings. Even if your partner is not an alcoholic, you will hear people talking about reclaiming their lives and their power. You don't have to say anything. No one will talk to you or bother you. Just go and listen. No pressure. Let the love seep into you.
There's a big, wide wonderful world out there, and I think you're getting read to Break Out into it!