If your parents have the ability to turn your phone off, that means your phone plan is in their name, not yours.
I suggest you get a job and if you do have a job, maybe get a better job or work more hours so you can afford to move out on your own. This way, you can pay for your own way and do whatever you want to do whenever you want to do it.
That is the solution to having freedom.
So, if I were you, I would make a full time job out of getting a job or a part time job of getting better employment so you can afford the lifestyle you want for yourself.
In the meanwhile, regardless of your age. When you live with mommy and daddy, you live under their thumb and under their roof, so you live under their rules...........or move out. It really is quite simple. You live in their house, so either obey their rules or be free to leave and make up your own rules in your new place.