You'll be able to upgrade your O2 device for free if you've already paid off your Device Plan, or your contract has come to an end. If you're on O2 Refresh, you can pay off the rest of your Device Plan and upgrade whenever you like. You don’t even need to pay anything upfront for your new device. And if you're on a standard contract, you might be able to pay a fee to upgrade early, if your contract hasn't come to an end yet.