Financing My New IPhone

I just got approved for financing my new iPhone and I’m set to be billed for the next 24 months at a set price. I was wondering if it’s possible to pay more per month than the set paying amount that’s billed to me? I want to pay off my phone earlier. Instead of paying off my new iPhone in 24 months, I want to pay it off a lot sooner. Is there a way to increase my monthly installments so that I could pay my phone off sooner?