Reddit:

Last week I upgraded my iPhone from the Xs to the 11Pro and the sales person asked me if I wanted AppleCare+, I did and now you have the option of paying for it all up front or paying month to month. I said that I’d likely upgrade my phone again next year so it probably made more sense to go month to month. I told him I wish this would have been an option the last time, cause now I have a year left that I’ve already paid for. He said most people don’t know about this, but you can call Apple support and they’ll reimburse you for the remaining coverage. I just called and in less than 5 minutes, including the wait time to speak with someone, he processed my reimbursement for about $75. The only information I needed was the serial number of the phone I traded in which was on the box that I still had. There may be another way to find it if you don’t have your box, but in my case I was good.

Good to know. Surprised you have to make a call to make this happen.

If you plan to trade in your Apple product (you can trade in Macs too!), ask at the Apple Store if they can credit your unexpired AppleCare+. If you are successful, please do let me know. I’d like to verify this.

UPDATE: If you plan a trade-in, spend a minute on Apple’s How to manage your AppleCare plan support page. [H/T Andy Rubin]