I have no idea if you are in high school or have a million dollar business. I doubt the latter. But, if for business, it is a tax deduction.
Only you know what your financial situation may be. Letting others decide what to do with your disposable income can be disastrous. It is easy to spend another person's money. If it is for fun, maybe consider saving your money and invest in something that will give you a ROI. Let some of that pay for it. If your old phone works, repair it. Save your money. Worse times are surely coming. You won't be able to eat your phone. Think about wants vs necessity.