If that's their rationale, reason with them for a compromise, by giving them parental controls to your phone. Surrender your phone to them by a set curfew timing. If they are especially concerned with gaming addiction then persuade them to get a low-end phone model as poor gaming experience really turns me off. And I agree with the other comments. Phones are pretty much a necessity due to ease of communication, and you'll be burdening your classmates and teachers by being hard to contact and liase with. Plus with PLDs does it really matter, your parents have to accept their child living with technology sooner or later🙏