I'm guessing the accessory is the pop socket, but it's too far down the article and hence hidden by the paywall. The little glue-on rings people used on their p

I'm guessing the accessory is the pop socket, but it's too far down the article and hence hidden by the paywall. The little glue-on rings people used on their phones are another contender, but those seem to be on the outs. I admit, I've always these devices to be so perplexing. Why would I want to make my phone awkwardly thick in just one spot? I had an iPhone 7+. Hated it. Easily the worst iPhone I ever owned; replacing it with an X, which actually fits in my hand, has been the best phone decision ever, particularly because it's also my favorite iPhone ever. But mostly-- buy a phone that fits in your hand and pocket.