How Do I Not Be Able To Be Tracked On My Phone?

I'm planning on running away. Please do not try to convince me not to because my mind is made up. I'm 17 years old and when i run away i want to be able to take my iphone x but my mom bought the phone and i don't want to be able to be tracked. How can i take the plan off my phone or just not be able to be tracked. I need a solid plan.

The obvious solution is to leave your phone behind.

If your phone is unlocked, then throw away the SIM card and buy a PAYG SIM, pay cash; use an independent retailer with no CCTV.

Too bad, you can't so might as well stay home before making the decision to not leave or come back