This is not a lease! With leases, you never own the item. This is a 36-month payment plan with an option to upgrade after you've made 24 payments.
If you ever want to pay off the plan completely, you can do that. There's no penalty or fee for paying it off early. Similarly, if you end up not wanting to upgrade, then you can just make all 36 payments and be done.
If you have more questions about this, just ping us in the chat!