If you're rocking an Apple Watch and one of these handsets then you can look even more "trendy" as you hold your wrist wearable up to a contactless terminal.
You'll need to make sure you're rocking at least iOS 8.1 of your iPhone 6 (the latest version is 8.4) for Apple Pay to work - if you are, head over to the Passbook app.
You should see an Apple Pay box at the top of the display - hit "Add credit or debit card" and follow the on screen instructions to set up the system.
Go forth and pay
Once you've added a supported card to Passbook (not all UK banks are currently onboard), you can venture out to the shops and use your phone (or watch) to pay anywhere which displays the Apple Pay or contactless payment logos. Look for either of the logos below.
It's not just in-store where you can utilise Apple Pay. You can also use it to pay for goods within participating apps, from tickets and clothing to groceries and DVDs - although only a handful of developers have enabled the system on their apps for now.
Those of you rocking older iPhones (iPhone 5S and earlier) are out of luck, as Apple Pay is only supported on the Cupertino firm's last duo of devices.
Sign up to receive daily breaking news, reviews, opinion, analysis, deals and more from the world of tech.
John joined TechRadar over a decade ago as Staff Writer for Phones, and over the years has built up a vast knowledge of the tech industry. He's interviewed CEOs from some of the world's biggest tech firms, visited their HQs and has appeared on live TV and radio, including Sky News, BBC News, BBC World News, Al Jazeera, LBC and BBC Radio 4. Originally specializing in phones, tablets and wearables, John is now TechRadar's resident automotive expert, reviewing the latest and greatest EVs and PHEVs on the market. John also looks after the day-to-day running of the site.