Also, do you have to give your phone back with Sky Mobile?
As long as there's no damage and the 'market value adjustment' does not apply, the value for your old device will pay off your credit agreement in full so you don't need to pay anything to Swap.
Also Know, do Sky customers get discount on Sky Mobile? If you've got Sky TV or Sky broadband at home, you don't get a discount for joining Sky Mobile.
Also to know is, can I change network when I upgrade my phone?
If you want to upgrade early and move to a different network to the one you're currently on, you're required to pay off the remainder of your current contract (what you agreed to pay each month, multiplied by how long you have left on it).
Do I own my phone after 24 months?
Typically the cost of your phone is divided over 24 months. As long as you still owe money on your phone, you can't leave your carrier. When you've paid the phone off, you own it. Unlike the subsidy model, this usually also means your monthly bill is cheaper once your phone is paid off.