Can I deduct part of my cell phone expenses as a doordasher even if my plan isn’t in my name but I pay my part of it? I know I can only deduct the business use percentage

I just started doordashing and I know that you can write off part of your cell phone plan as a business expense. Can I still do this if the plan is in my mom’s name? She has paid for the phone until recently, but I just turned 18 and I now pay for my part of the plan. Can I write this off or would I have to get my own plan?