My mom doesn't want to buy me a iPhone, and I really want one how do I get her to say yes?

Wash all the dishes, do the family laundry and come home on time every day. She may be so startled she won't be aware of the cost. 😉

Tell her that when you go out she can make it a rule you have to call her every half hour and tell her what you are doing with whom. You will also run the "Find my Friends" app so she can keep track of your physical locaiton. If you do anything to try to get around this you agree to be grounded.

Back when I was a kid, mothers had whistles...

Get a job.

Save your money.

Pay for it yourself.

Pay the monthly service fees yourself.

Get a job.

I have to agree with diesel vdub and Kilted Tim on this due to the cost of the phone and plan cost would be expensive.

sell everything you own and then buy it your self

Jonny, now if I could just get my kids to do what you did .........