If your parents won't buy you a phone, there are a few things you can do. You could try to save up your own money to buy one, or you could ask if they would be willing to let you use an old phone of theirs. If they're still not budging, then your best bet might be to try and convince them that having a phone is actually a good thing. Explain how it would help you stay connected with your friends and family, and how it would give you a sense of responsibility. Hopefully they'll see your point of view and change their mind!